Prevx Research Division
PDFPREVHNDLRSHIM.EXE
Malicious SoftwareFree PC Cleanup from Webroot
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Associated Malware Groups
The unsafe files using this name are associated with the malware groups:
- Malicious Software
- Worm
File Behavior
PDFPREVHNDLRSHIM.EXE has been seen to perform the following behavior:
- Hooks the WININET.DLL function allowing it to read or copy Http and Https web page content and session information
- Executes a Process
- This Process Deletes Other Processes From Disk
- Copies files
- Disables safe mode on your PC
- Injects code into other processes
- Adds a Registry Key (RUN) to auto start Programs on system start up
- This process creates other processes on disk
- Modifies the Windows Host File which could be used to stop you visiting specific web sites by redirecting you to alternative addresses without you knowing
- Includes file creation code which could be used to test for interception by security products
- The Process is polymorphic and can change its structure
- The Process is packed and/or encrypted using a software packing process
- Writes to another Process's Virtual Memory (Process Hijacking)
- Registers a Dynamic Link Library File
- Drops known malicious software during execution
- Uses functions commonly exploited by Worms
PDFPREVHNDLRSHIM.EXE has been the subject of the following behavior:
- Executed as a Process
- Created as a process on disk
- Has code inserted into its Virtual Memory space by other programs
- Deleted as a process from disk
- Registered as a Dynamic Link Library File
- Created by processes which appear to be checking for interception by security products
- Copied to multiple locations on the system
- Enabled as a COM Object/Server on the Local Machine
Country Of Origin
The filename PDFPREVHNDLRSHIM.EXE was first seen on Jun 2 2007 in the following geographical regions of the Webroot community:
- Europe on Jun 2 2007
- Romania on Jun 29 2007
- Spain on Jun 29 2007
- Netherlands on Oct 2 2007
- Poland on Oct 2 2007
- The United Kingdom on Jan 11 2010
- Turkey on May 24 2012
File Name Aliases
PDFPREVHNDLRSHIM.EXE can also use the following file names:
- 68776606.EXE
- 35603884.SVD
- 74674857.EXE
- 32292983.EXE
- 66344295.SVD
- 24343471.EXE
Filesizes
The following file size has been seen:
- 175,016 bytes
- 104,003 bytes
- 181,672 bytes
- 49,536 bytes
- 37,000 bytes
- 152,448 bytes
- 122,748 bytes
File Type
The filename PDFPREVHNDLRSHIM.EXE is used by multiple object types including executable programs,objects.
File Activity
One or more files with the name PDFPREVHNDLRSHIM.EXE creates, deletes, copies or moves the following files and folders:
- create folder C:\WINDOWS\uninstall\
- Creates c:\windows\uninstall\rundl132.exe
- Creates c:\windows\Logo1_.exe
- Deletes c:\docume~1\user\locals~1\temp\$$aB.bat
- Creates c:\docume~1\user\locals~1\temp\$$aB.bat
- Creates c:\_desktop.ini
- Creates c:\windows\RichDll.dll
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