PDF_MALPHISH.GTLZ

May 25, 2017
 Analysis by: Michael Jay Villanueva
 ALIASES:

PDF/Trojan.ZBLB-4 (Cyren); PDF/Phishing.A.Gen (ESET-NOD32); Trojan.PDF.Phishing (Ikarus)

 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.

  TECHNICAL DETAILS

File Size:

168,852 bytes

File Type:

PDF

Memory Resident:

No

Initial Samples Received Date:

20 Apr 2017

Payload:

Displays graphics/image

Arrival Details

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

NOTES:

Upon execution of the file, the user is presented with a fake message tricking them to click on the following malicious link:

  • http://{BLOCKED}3.{BLOCKED}no.ru/ni/pdf

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

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.370.06

FIRST VSAPI PATTERN DATE:

29 Apr 2017

VSAPI OPR PATTERN File:

13.371.00

VSAPI OPR PATTERN Date:

30 Apr 2017

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_MALPHISH.GTLZ. 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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