Trojan.PDF.MALINK.AUHF

August 17, 2021
 Analysis by: Paul Steven Nadera
 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:

Downloaded from the Internet, Dropped by other malware

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

It redirects browsers to certain sites. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

251,981 bytes

File Type:

PDF

Memory Resident:

No

Initial Samples Received Date:

03 Aug 2021

Payload:

Connects to URLs/IPs, Displays graphics/image

Arrival Details

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

Other Details

This Trojan redirects browsers to the following sites:

  • https://{BLOCKED}.in/Hoad
    • short URL which redirects to:
      • http://{BLOCKED}.{BLOCKED}.91.134/pdf_0093494949/pdf_1234443434.html

It does the following:

  • It displays the following images to lure the user to redirect their browser to a malicious link:

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

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

16.882.04

FIRST VSAPI PATTERN DATE:

03 Aug 2021

VSAPI OPR PATTERN File:

16.883.00

VSAPI OPR PATTERN Date:

04 Aug 2021

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 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 Trojan.PDF.MALINK.AUHF. 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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