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TROJ_PIDIEF.SMAQ

November 15, 2012
 Analysis by: Rika Joi Gregorio
 ALIASES:

Exploit:Win32/Pdfjsc.AEI (Microsoft), JS/Exploit.Pdfka.PUY trojan (Eset), Exploit.PDF-JS.GY (Bitdefender)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


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

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

36886 bytes

File Type:

PDF

Memory Resident:

No

Initial Samples Received Date:

02 Nov 2012

Arrival Details

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

Download Routine

This Trojan accesses the following websites to download files:

  • http://tildenlawoffice.com/wp-includes/1101.exe
  • http://presentu.info/5.bin

It saves the files it downloads using the following names:

  • %User Temp%\{random1}.{random}
  • %User Temp%\{random2}.{random}

(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.)

Other Details

However, as of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.508.03

FIRST VSAPI PATTERN DATE:

05 Nov 2012

VSAPI OPR PATTERN File:

9.509.00

VSAPI OPR PATTERN Date:

06 Nov 2012

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

Remove malware/grayware files dropped/downloaded by TROJ_PIDIEF.SMAQ

     
    • %User Temp%\{random1}.{random}
    • %User Temp%\{random2}.{random}

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_PIDIEF.SMAQ. 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.


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