PDF malware analysis — malicious · 7521a3477b4cf1cf

MALICIOUS

PDF

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

MD5: accde931b41a20194af4755b117bb60a SHA-1: 84dadd5a882235574a85ecb11a0586e9f2996701 SHA-256: 7521a3477b4cf1cf161b97354ffdcc2bf693ba14d823ee733a55a889471b8875

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, identified by heuristics and ClamAV as malicious (Win.Trojan.Agent-36166). The JavaScript appears to be heavily obfuscated but is designed to download and execute a secondary payload. This is a common technique for delivering malware via email attachments.

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` `1b1758e97cb18d127b032e34fde4094657b6f12cd185b7454ed98731f64d57e9`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74314 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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