PDF malware analysis — malicious · 7182a7c2c85c6ad0

MALICIOUS

PDF

14.5 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: f621e5981ecd70d6d44b4c7f54dd9cad SHA-1: b3fcca881c26b1ad6ef9cc22926003cd3b085581 SHA-256: 7182a7c2c85c6ad06d26a68990d2f564386a7ea73c6cc3ccdaaf17c92cbf11c3

166 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by multiple engines, including ClamAV which identified it as Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating an attempt to exploit vulnerabilities within the PDF reader for code execution. The JavaScript is heavily obfuscated, but its presence and the overall malicious classification strongly suggest it's designed to download and execute a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36166
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `99e1c2f20c19d720031ff62e43f83f329041eef2434692b356c631d3861084a6`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75176 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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