PDF malware analysis — malicious · 7594c736482705b1

MALICIOUS

PDF

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

MD5: e949611a1367293dc9544293bfa6e45d SHA-1: f07cb14ff23c3dfbf027cb047aa3d37946beeea9 SHA-256: 7594c736482705b1a9ae3ecf2f69a7e85168dd820d019728a020bb7ca60140d1

166 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is a PDF containing obfuscated JavaScript, flagged by multiple heuristics and a machine learning classifier as malicious. ClamAV identifies it as Win.Trojan.Agent-36166. The JavaScript is likely responsible for exploiting a PDF vulnerability to download and execute a secondary payload, as indicated by the 'Exploitation for Client Execution' technique.

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` `c22f060eeb8559c2b9dcb5444cdf0d219c9b740c51c9af3a01236a5115cc01e5`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74422 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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