PDF malware analysis — malicious · 4e01e2d5e175c131

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: d9cc6cfe847263a0c5d1499ba7b18ec3 SHA-1: a5820ec0c85a6d651f2d5f3482595c6af1bab046 SHA-256: 4e01e2d5e175c131242123b8c477cc4bb2487d1c3e335c7f3ae04dd03fc9a233

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF file was flagged as malicious by multiple engines, including ClamAV which identified it as Win.Trojan.Agent-36166. Heuristics indicate the presence of JavaScript actions and embedded JS streams within the PDF. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves the execution of this embedded JavaScript, which is a common technique for downloading and executing further malicious payloads.

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` `b30c9a81e4072c6e01f649ebe14b309718b033179d574f1a663915c52c804549`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74781 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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