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PDF_PHISH.YTUDY

January 16, 2017
 Analysis by: Pearl Charlaine Espejo
 ALIASES:

Pdf.Trojan.Phish.Wofy (Tencent); Trojan.PDF.Phish.dv (Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Spammed via email


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

It does not have any propagation routine.

It does not have any backdoor routine.

  TECHNICAL DETAILS

File Size:

162,984 bytes

File Type:

PDF

Memory Resident:

No

Initial Samples Received Date:

12 Dec 2016

Payload:

Displays fake message

Arrival Details

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

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

NOTES:

This malware arrives in the following spammed email:

Upon execution of the file, the user is presented with a fake message tricking users to click on the malicious link http://{BLOCKED}echusa.com/8373

However, as of this writing, the said site is inaccessible.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.956.03

FIRST VSAPI PATTERN DATE:

12 Dec 2016

VSAPI OPR PATTERN File:

12.957.00

VSAPI OPR PATTERN Date:

13 Dec 2016

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as PDF_PHISH.YTUDY. 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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