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PDF_MALPHISH.AUSJEQUS

February 05, 2018
 Analysis by: Michael Jay Villanueva
 ALIASES:

PDF/Trojan.GFAV-7 (Cyren)

 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:

Dropped by other malware, Downloaded from the Internet, Spammed via email


This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It does not have any propagation routine.

It does not have any backdoor routine.

  TECHNICAL DETAILS

File Size:

104,496 bytes

File Type:

PDF

Memory Resident:

No

Initial Samples Received Date:

31 Jan 2018

Payload:

Connects to URLs/IPs, Displays windows

Arrival Details

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

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Other Details

This Trojan presents the user a fake message tricking them to click on the following link:

  • Upon clicking the "View Documents" image/button, the malware will connect to:
    • https://{BLOCKED}t.org/biz/eimprovement/index.php
  • However, as of this writing, the said sites are inaccessible.

NOTES:

This Trojan shows the following fake message inside the PDF tricking the users to click on the link:

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.938.04

FIRST VSAPI PATTERN DATE:

31 Jan 2018

VSAPI OPR PATTERN File:

13.939.00

VSAPI OPR PATTERN Date:

01 Feb 2018

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

Identify and terminate files detected as PDF_MALPHISH.AUSJEQUS

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Close all opened browser windows

Step 4

Scan your computer with your Trend Micro product to delete files detected as PDF_MALPHISH.AUSJEQUS. 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 the following Trend Micro Support pages for more information:


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