PDF malware analysis — malicious · a5ed61f93fb55b95

MALICIOUS

PDF

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

MD5: b3ebd3988d49fe51c8d1708f97b517f1 SHA-1: f524254e5b38399c69e9395a12cb04c89696653c SHA-256: a5ed61f93fb55b95f63b26b7965451d1704edbad771e36a7e5028aa24a00932c

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, evidenced by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristic firings. The critical 'CLAMAV_DETECTION' and 'EXTRACTED_FILE_CLAMAV' firings identify the file as 'Win.Trojan.Agent-36166'. The embedded JavaScript is likely responsible for executing the malicious payload, leading to the malware detection. The document body is unreadable, so the rationale is based on the technical findings.

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` `b2f7deba2ae67a5356bfda715b2bf3c1c1d70945bf7e2068eebb60623bacac6a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	83612 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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