TROJ_PIDIEF.EGN

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Installation

This Trojan drops the following non-malicious file:

• %User Temp%\Adobe.pdf

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

Dropping Routine

This Trojan drops the following files:

• %Application Data%\GoogleUpdate.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

NOTES:
This is the Trend Micro detection for a specially-crafted PDF that exploits a certain vulnerability in Adobe Reader and Acrobat. Once successful, it drops an embedded executable file. It then runs the malware and as a result, the malicious routines of the dropped file are also exhibited in the system. It also opens the non-malicious dropped PDF, %User Temp%\Adobe.pdf, to hide its malicious routines from the user.