PDF malware analysis — malicious · cf6e5a831b15c261

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: 9d16c1b9f18d2051db1189205f51cb82 SHA-1: 5006ccdbc10eb579f564d734acacef1993b0c5ec SHA-256: cf6e5a831b15c261c2c967e5b1ef1f2a462e7031b5ad54746fa20b82f05bb957

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating an attempt to execute malicious code. The JavaScript action and embedded JS stream heuristics further support this. The primary IOC is the ClamAV detection signature.

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` `996aa3a8058582676459ad087db4af5aebc713d82d2d3848485a8e36471a6fdf`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75128 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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