Win.Trojan.Agent-36166 PDF malware analysis — malicious · 59521940ad7376a8

MALICIOUS

PDF

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

MD5: 8236d6f58dd61b40441f4028732bab05 SHA-1: 1ff4399109a34a8859ab22a28081badb9de524e5 SHA-256: 59521940ad7376a893da719484fb9930096f83c3fd8d13b516bac88abb531012

136 Risk Score

Malware Insights

Win.Trojan.Agent-36166 · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell

The critical ClamAV heuristic firings indicate the file is recognized as Win.Trojan.Agent-36166. The PDF structure contains embedded JavaScript, which is a common technique for delivering malicious payloads. The document body is unreadable, but the presence of JavaScript and the ClamAV detection strongly suggest the intent is to download and execute a second-stage payload.

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` `d5131618ab45b53d355b3637387a6a63edb0b3332a5036ce66901937e7c3d9fa`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74754 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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