PDF malware analysis — malicious · 33cf035fbb526fac

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: ce05241e60ffe2f6d4fb9248f77835de SHA-1: 5086ca29334346d6ff118201565fec2d6bfd2b0c SHA-256: 33cf035fbb526facf594b3047ccf25e231076f1034415c8242d69be250f7e2c6

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains embedded JavaScript, indicated by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics. ClamAV detections 'Win.Trojan.Agent-36166' on both the main file and an extracted artifact strongly suggest malicious intent. The embedded JavaScript is likely used to download and execute a secondary payload, a common technique for malware delivery. The specific nature of the JavaScript's execution is not fully detailed due to potential obfuscation, but its presence alongside the ClamAV detections points to a malicious exploitation attempt.

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` `ee2815b906406d449f900b9c74d2630e79e52f21cd1493118efe56739261e83b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74539 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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