PDF malware analysis — malicious · 080799a76cf66b49

MALICIOUS

PDF

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

MD5: 87d0cd5c9ab03a0c6b175e10d7140e43 SHA-1: 02aacb1c0b59efbb804877dddd289ab56ff2ccb5 SHA-256: 080799a76cf66b4973378bdcd456cbd5cb8be00a3fe3fb518d3829be75cf34ef

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, identified by multiple heuristics and ClamAV detection as malicious (Win.Trojan.Agent-36166). The JavaScript is heavily obfuscated but appears to be responsible for downloading and executing a secondary payload. This is a common technique for delivering malware via email attachments.

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` `aabaaaddfcdc51a4e563ff90780be2e310fd2774aaee11fd224f3f2d960da32e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	76563 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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