PDF malware analysis — malicious · daa8f43bbe70d295

MALICIOUS

PDF

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

MD5: 7d8cc0b03d7e4bc082a2002fc9c25ea1 SHA-1: 318dd957bc473063fd8308e0b5e47365a3478826 SHA-256: daa8f43bbe70d2951ca67cf8c2a1e2b30cfc778f607760e46394d5367cb57ff7

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file triggered critical heuristics indicating it is malicious, specifically ClamAV detections for 'Win.Trojan.Agent-36166'. The presence of embedded JavaScript, identified by 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics, suggests an attempt to execute code. While the document body is unreadable, the combination of PDF structure and JavaScript points to a common delivery mechanism for malware. The specific ClamAV signature is the primary IOC.

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` `a56c8c803fc590a8607de479fdeb0de0c75b8d2c9d1c93ac056159ecd2ea505b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	84125 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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