PDF malware analysis — malicious · c19d85c8668bea3a

MALICIOUS

PDF

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

MD5: b504d7f73858ee04234f667c357ac017 SHA-1: 72370781704853e6788accd10163fa1c071f0647 SHA-256: c19d85c8668bea3ab124c34c0bc8d1e457bc417bf9c3766874c2d55fc7636c7c

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious intent. Specifically, the presence of embedded JavaScript (PDF_JAVASCRIPT, PDF_JS) suggests an attempt to execute code. The ClamAV detection of 'Win.Trojan.Agent-36166' further supports its classification as a malicious agent, likely involved in downloading and executing further stages.

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` `f62f8644f69ac74cd60dc445d80d359ae236e537149ec7e53419467995079dac`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	73937 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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