Threat Encyclopedia

TROJ_DROPPI.PDF

Publish date: October 09, 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: No

  • 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 dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.

It bears the file icons of certain applications to avoid easy detection and consequent removal. It executes then deletes itself afterward.

It does not have any propagation routine.

It does not have any backdoor routine.

It does not have any downloading capability.

It does not have any information-stealing capability.

TECHNICAL DETAILS

File Size:

202,240 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

15 Sep 2011

Arrival Details

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

It may be dropped by other malware.

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

Installation

This Trojan drops and executes the following files:

  • %User Temp%\Acrobat.exe - TROJ_DROPPER.QUB
  • %User Temp%\pr_110719.pdf - TROJ_PIDIEF.FUA

(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.)

It bears the file icons of the following applications:

  • Microsoft Word

It executes then deletes itself afterward.

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Download Routine

This Trojan does not have any downloading capability.

Information Theft

This Trojan does not have any information-stealing capability.

NOTES:

Rootkit Capabilities

This malware does not have rootkit capabilities.

SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

8.430.12

FIRST VSAPI PATTERN DATE:

15 Sep 2011

VSAPI OPR PATTERN File:

8.431.00

VSAPI OPR PATTERN Date:

16 Sep 2011

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 files dropped/downloaded by TROJ_DROPPI.PDF

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_DROPPI.PDF. 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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