PDF malware analysis — malicious · 347b5a5331879e6b

MALICIOUS

PDF

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

MD5: 24f0b4a30d69aac23b7d9dcf53259b75 SHA-1: 9aa54e5e82643de84a97fe422ce4ba65091e8804 SHA-256: 347b5a5331879e6b968925df54dba574f6291fa626e07db6a468d3bd85c3d860

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file triggered critical heuristics for embedded JavaScript and ClamAV detection, identifying it as Win.Trojan.Agent-36166. The embedded JavaScript stream is likely responsible for downloading and executing a second-stage payload, which is a common technique for malware delivery. The document body was unreadable, but the presence of JavaScript and the ClamAV signature strongly indicate malicious intent.

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` `45b347bf7cf0d96222a8ca5c128b568b19810fcfaae34667b73668e052f2741f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74366 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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