PDF malware analysis — malicious · 9f812d11bfa487a4

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: 4c448680a820248a262736be1fe722a1 SHA-1: 409ebb0e337574d96c7acfe0ee294ebbb61fc47f SHA-256: 9f812d11bfa487a412b31ced40467f30026618380eff2c42ab4f792bf8a48eb6

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The file is a PDF document with embedded JavaScript, identified by heuristics as a potential attack vector. ClamAV detections indicate it is a known trojan. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, contributing to the malicious nature of the file. The specific JavaScript stream was too large to analyze in detail, but its presence and the ClamAV detection strongly suggest 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` `3b7a8f22fcf3faa70a1876d9797754da7916aa1016e54dfeacfd4fe505ece098`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74762 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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