PDF malware analysis — malicious · 6a0a2085fec458ba

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: 00c18b527499b3cf346eca80d98e834d SHA-1: 88b1e3f29a79b59ff6f39ffa5b50b51db5673634 SHA-256: 6a0a2085fec458ba4b8026f41a4dd187e95157b87c471c28061731d92a15d528

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. Embedded JavaScript, though obfuscated, is present and likely responsible for downloading and executing a secondary payload, a common technique for malware delivery. The presence of JavaScript and the malicious verdict strongly suggest a spearphishing attachment attack vector.

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` `466919bbf2b59093509b7826e960ea84b1e7a96495e0413418b10fcf705df8c2`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75153 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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