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TROJ_PDFJSC.WV

October 08, 2012
 Analysis by: Karl Dominguez
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It may be unknowingly downloaded by a user while visiting malicious websites.

As of this writing, the said sites are inaccessible.

It takes advantage of certain vulnerabilities.

  TECHNICAL DETAILS

File Size:

2,870 bytes

File Type:

PDF

Memory Resident:

Yes

Initial Samples Received Date:

04 Feb 2011

Payload:

Downloads files

Arrival Details

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

It may be unknowingly downloaded by a user while visiting malicious websites.

Download Routine

After successfully exploiting the said vulnerability, this malware connects to the following URLs to possibly download other malicious files:

  • http://{BLOCKED}.{BLOCKED}.61.160/cntr.exe

As of this writing, the said sites are inaccessible.

Other Details

More information on this vulnerability can be found below:

It takes advantage of the following vulnerabilities:

  • CVE-2008-2992 - util.printf

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

7.810.16

VSAPI PATTERN Date:

04 Feb 2011

VSAPI PATTERN Date:

2/4/2011 12:00:00 AM

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Scan your computer with your Trend Micro product to delete files detected as TROJ_PDFJSC.WV. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.

Step 3

Download and apply this security patch Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.  http://get.adobe.com/reader/


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