PDF malware analysis — malicious · 67cee6367fa6e4f6

MALICIOUS

PDF

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

MD5: ebe196f5b1e4ed4c2f5643b6ae9476ee SHA-1: 9ce9ba6338d49d65c3daa9c17bd5a6980ccf0244 SHA-256: 67cee6367fa6e4f6d5ebd09d0f753b7970477cb1391f7f284e9050f9dafd3830

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, with ClamAV identifying it as Win.Trojan.Agent-36166. The embedded JavaScript, though obfuscated, is designed to download and execute a secondary payload. This behavior is consistent with a downloader trojan delivered via a phishing attachment.

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` `729bbc42c8e3b2bc06681534dac301ee52a68964f79322ef3b292d338e534369`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75930 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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