Analysis by: Kathleen Notario
 PLATFORM:

Windows 98, ME, NT, 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Once a malware successfully exploits the said vulnerability, it causes certain actions to be done on the system.

  TECHNICAL DETAILS

File Size: 235,668 bytes
File Type: Script
Memory Resident: No
Initial Samples Received Date: 22 Jul 2010

Other Details

Based on analysis of the codes, it has the following capabilities:

  • takes advantage of the vulnerability in the Doc.media.newPlayer method in Multimedia.api which allows remote attackers to execute arbitrary code via a crafted PDF file using ZLib compressed streams.

Once a malware successfully exploits the said vulnerability, it causes the following actions to be done on the system:

  • it drops or downloads other malicious files into the affected system.

More information on this vulnerability can be found below:

  • http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-4324

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI PATTERN File: 7.330.08
VSAPI PATTERN Date: 22 Jul 2010
VSAPI PATTERN Date: 7/22/2010 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 JS_PDFKA.AP. 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.


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