PDF malware analysis — malicious · f4d93ea3b989c5da

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: 758fccb149791cc7ff5ff05a050422fb SHA-1: b338a2f096d29b7d6a58c5b4cd040cdd4bf8a9e2 SHA-256: f4d93ea3b989c5dadc3e72309cf79caa156ee05dd6569c82de84e114e0a5015e

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 the document's primary function is to execute malicious code. The JavaScript is likely responsible for downloading and executing a second-stage payload, although the exact mechanism is obscured by obfuscation.

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` `9667c6b0dbc3db9280ec3c807d72d40edea7577346b31e73bf8246f3ea16f263`	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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