PDF malware analysis — malicious · 690e8b016b9aa252

MALICIOUS

PDF

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

MD5: 9dc48e40ac800c1d357d9dbbfd647e60 SHA-1: 7a39d506ab166c1070b681f121c5704dd1f02054 SHA-256: 690e8b016b9aa2521f49e61f73765da501a2097d5c77c2086df50907f35586da

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics and a machine learning classifier as malicious. It contains embedded JavaScript, which is often used to download and execute further malicious content. The ClamAV detection name 'Win.Trojan.Agent-36166' strongly suggests a trojan downloader or agent.

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` `4d30012d0c7104cf91c88f83b75399174bde31d51096b778c9793e740212731a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75246 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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