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What is BestPDFSearch?

The Malwarebytes research team has determined that BestPDFSearch is a search hijacker. These so-called "hijackers" manipulate your browser(s), for example to change your startpage or searchscopes, so that the affected browser visits their site or one of their choice.

How do I know if my computer is affected by BestPDFSearch?

You may see this entry in your list of installed Chrome extensions:

main.png

and this changed setting:

warning5.png

You may have noticed these warnings during install:

warning1.png

warning2.png

warning3.png

warning4.png

How did BestPDFSearch get on my computer?

Browser hijackers use different methods for distributing themselves. This particular one was downloaded from the webstore:

webstore.png

after a redirect from their website:

website.png

How do I remove BestPDFSearch?

Our program Malwarebytes can detect and remove this search hijacker.

  • Please download Malwarebytes for Windows to your desktop.
  • Double-click MBSetup.exe and follow the prompts to install the program.
  • When your Malwarebytes for Windows installation completes, the program opens to the Welcome to Malwarebytes screen.
  • Click on the Get started button.
  • Click Scan to start a Threat Scan.
  • When the scan is finished click Quarantine to remove the found threats.
  • Reboot the system if prompted to complete the removal process.

Is there anything else I need to do to get rid of BestPDFSearch?

  • No, Malwarebytes removes BestPDFSearch completely.

How would the full version of Malwarebytes help protect me?

We hope our application and this guide have helped you eradicate this hijacker.

As you can see below Malwarebytes Browser Guard, and the full version of Malwarebytes would have protected you against the BestPDFSearch hijacker. It would have blocked their website, giving you a chance to stop it before it became too late.


 

protection1.png

 

protection2.png

 

Technical details for experts

Possible signs in FRST logs:


 

CHR DefaultSearchURL: Default -> hxxps://feed.bestpdfsearch.com/?q={searchTerms}&publisher=bestpdfsearch&barcodeid=579320000000000
CHR DefaultSearchKeyword: Default -> BestPDFSearch
CHR DefaultSuggestURL: Default -> hxxps://api.bestpdfsearch.com/suggest/get?q={searchTerms}
CHR Extension: (BestPDFSearch) - C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\ogbogblfllonoloohickhaibcgkpheck [2020-09-16]

Alterations made by the installer:
 

File system details [View: All details] (Selection)
---------------------------------------------------
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\ogbogblfllonoloohickhaibcgkpheck\1.1.0_0
       Adds the file manifest.json"="9/16/2020 8:49 AM, 2096 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\ogbogblfllonoloohickhaibcgkpheck\1.1.0_0\_metadata
       Adds the file computed_hashes.json"="9/16/2020 8:49 AM, 6255 bytes, A
       Adds the file verified_contents.json"="8/4/2020 9:23 AM, 2049 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\ogbogblfllonoloohickhaibcgkpheck\1.1.0_0\images
       Adds the file logo-white-text.png"="8/4/2020 9:23 AM, 0 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\ogbogblfllonoloohickhaibcgkpheck\1.1.0_0\images\icons
       Adds the file 128x128.png"="9/16/2020 8:49 AM, 1516 bytes, A
       Adds the file 16x16.png"="9/16/2020 8:49 AM, 337 bytes, A
       Adds the file 64x64.png"="9/16/2020 8:49 AM, 958 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\ogbogblfllonoloohickhaibcgkpheck\1.1.0_0\scripts
       Adds the file background.js"="8/4/2020 9:23 AM, 514502 bytes, A
       Adds the file sitecontent.js"="8/4/2020 9:23 AM, 77 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\ogbogblfllonoloohickhaibcgkpheck
       Adds the file 000003.log"="9/16/2020 8:56 AM, 863 bytes, A
       Adds the file CURRENT"="9/16/2020 8:49 AM, 16 bytes, A
       Adds the file LOCK"="9/16/2020 8:49 AM, 0 bytes, A
       Adds the file LOG"="9/16/2020 8:49 AM, 183 bytes, A
       Adds the file MANIFEST-000001"="9/16/2020 8:49 AM, 41 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Web Applications\_crx_ogbogblfllonoloohickhaibcgkpheck
       Adds the file BestPDFSearch.ico"="9/16/2020 8:49 AM, 160186 bytes, A
       Adds the file BestPDFSearch.ico.md5"="9/16/2020 8:49 AM, 16 bytes, A

Registry details [View: All details] (Selection)
------------------------------------------------
    [HKEY_CURRENT_USER\Software\Google\Chrome\PreferenceMACs\Default\extensions.settings]
       "ogbogblfllonoloohickhaibcgkpheck"="REG_SZ", "0B76AA30E5D0053378032D68B2B5C4D2F5BED7C6EE11EFF464CCA5E06AD2B181"

Malwarebytes log:
 

Malwarebytes
www.malwarebytes.com

-Log Details-
Scan Date: 9/16/20
Scan Time: 11:07 AM
Log File: 1c9eeb64-f7fc-11ea-b3d8-00ffdcc6fdfc.json

-Software Information-
Version: 4.2.0.82
Components Version: 1.0.1036
Update Package Version: 1.0.29921
License: Premium

-System Information-
OS: Windows 7 Service Pack 1
CPU: x64
File System: NTFS
User: {computername}\{username}

-Scan Summary-
Scan Type: Threat Scan
Scan Initiated By: Manual
Result: Completed
Objects Scanned: 232408
Threats Detected: 11
Threats Quarantined: 11
Time Elapsed: 7 min, 7 sec

-Scan Options-
Memory: Enabled
Startup: Enabled
Filesystem: Enabled
Archives: Enabled
Rootkits: Disabled
Heuristics: Enabled
PUP: Detect
PUM: Detect

-Scan Details-
Process: 0
(No malicious items detected)

Module: 0
(No malicious items detected)

Registry Key: 0
(No malicious items detected)

Registry Value: 1
Adware.SearchEngineHijack.Generic, HKCU\SOFTWARE\GOOGLE\CHROME\PREFERENCEMACS\Default\extensions.settings|ogbogblfllonoloohickhaibcgkpheck, Quarantined, 15320, 799722, , , , , , 

Registry Data: 0
(No malicious items detected)

Data Stream: 0
(No malicious items detected)

Folder: 2
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Sync Extension Settings\ogbogblfllonoloohickhaibcgkpheck, Quarantined, 15320, 799722, , , , , , 
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\DEFAULT\EXTENSIONS\OGBOGBLFLLONOLOOHICKHAIBCGKPHECK, Quarantined, 15320, 799722, 1.0.29921, , ame, , , 

File: 8
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Secure Preferences, Replaced, 15320, 799722, , , , , 49423EDB436F42E508E81016A2B99588, 6AF4B39AF9F74CEF26D8DA9644A1ED9FC0486FCA53D7929B8F7E58CD42A3B315
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Preferences, Replaced, 15320, 799722, , , , , 6D265D0C2598DF2417ABD02C4686FB15, 190BD52CC55D5BF9ADF94D87984E40C9A7619674D21F3744C9AD7ADD0E1F9519
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\ogbogblfllonoloohickhaibcgkpheck\000003.log, Quarantined, 15320, 799722, , , , , 4B1A039F3C947677CF85C5A73BC7A5CD, D25FF669BFDA20BB2461CB101014C8D08CF5A3A6B719AEF77F3B6EBC677F9B2E
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\ogbogblfllonoloohickhaibcgkpheck\CURRENT, Quarantined, 15320, 799722, , , , , 46295CAC801E5D4857D09837238A6394, 0F1BAD70C7BD1E0A69562853EC529355462FCD0423263A3D39D6D0D70B780443
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\ogbogblfllonoloohickhaibcgkpheck\LOCK, Quarantined, 15320, 799722, , , , , , 
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\ogbogblfllonoloohickhaibcgkpheck\LOG, Quarantined, 15320, 799722, , , , , 6D4370AB427E6EB767CCBC1474200258, 4B417B112A4E17B4EA7A07671B83C38FAFD95E88985ACF9E959ED972A810F64D
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\ogbogblfllonoloohickhaibcgkpheck\MANIFEST-000001, Quarantined, 15320, 799722, , , , , 5AF87DFD673BA2115E2FCF5CFDB727AB, F9D31B278E215EB0D0E9CD709EDFA037E828F36214AB7906F612160FEAD4B2B4
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\DEFAULT\EXTENSIONS\OGBOGBLFLLONOLOOHICKHAIBCGKPHECK\1.1.0_0\MANIFEST.JSON, Quarantined, 15320, 799722, 1.0.29921, , ame, , 83632CF9FCE020E5936BE334842D5C2E, 48B11E7BA8CC213B9DC595199EFCDF47D3F4DD67C5B837F661F490A22EF64012

Physical Sector: 0
(No malicious items detected)

WMI: 0
(No malicious items detected)


(end)

As mentioned before the full version of Malwarebytes could have protected your computer against this threat.
We use different ways of protecting your computer(s):

  • Dynamically Blocks Malware Sites & Servers
  • Malware Execution Prevention

Save yourself the hassle and get protected.

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