PDF malware analysis — malicious · 710685d3ff3da265

MALICIOUS

PDF

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

MD5: 47ede3ecf8b2044f43806fa001eb6744 SHA-1: 0a6074a0aa359a79822657011082c02e7e2cbdf9 SHA-256: 710685d3ff3da265b6538007ebd76609742c23175bc4135c9517fca0ed12cd50

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, flagged by multiple heuristics and a machine learning classifier. ClamAV identifies the sample as 'Win.Trojan.Agent-36166', indicating it's a known trojan. The JavaScript is heavily obfuscated but appears to be designed to download and execute a secondary payload, a common technique for malware delivery.

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` `5d0198c4ce1e33ecdc62e392ead9369b5e5923c2d85bbff22b6512543a2239b5`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	76509 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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