PDF malware analysis — malicious · 72ffc4e5c95ae074

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: a0d306ae9c476bdc9a115d1bdd35fc69 SHA-1: f4146166078b5494a8eae026a6dfa4ed5a2b4f02 SHA-256: 72ffc4e5c95ae074698e9e55de851c3c15991afebe17056e2418942e271611b9

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, identified by heuristics and a critical ClamAV detection (Win.Trojan.Agent-36166). The JavaScript appears to be obfuscated but is designed to download and execute a payload from a URL. 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` `42c6d2db7e11cac013cc37f96c6f417bab9f6c3e12a0bfd0cac9188e33774a5b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74787 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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