PDF malware analysis — malicious · 5cc29271662ae75d

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: 63ac3eedde72c6de48204d228c914ec2 SHA-1: 8c09ca609b18e36d75c134b48272c856442e5385 SHA-256: 5cc29271662ae75d8d361b8f012d441f0c5f047e4cf4a8835265df697b7a4a91

166 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is a PDF containing embedded JavaScript, which is flagged as malicious by multiple heuristics and a machine learning classifier. ClamAV detection confirms it as 'Win.Trojan.Agent-36166'. The JavaScript is heavily obfuscated but appears to be designed to download and execute a second-stage payload, a common technique for this type of threat.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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` `be7c81bb1ab81a79a6e8a668d274aec4ed2508cb8dbfa560350d6471a852e2f8`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75095 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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