PDF malware analysis — malicious · 6003ae80633b883d

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: 50bec135017e1f4e85f1ccb71ddb7901 SHA-1: 75136aa9b9f0edcf60329ba47b6aaf56a464e183 SHA-256: 6003ae80633b883d9430063626bae343edeb7a87d4ae1401bfe00856f70277fc

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities and delivering malicious payloads. Heuristics and ClamAV detection confirm this is a malicious PDF, specifically identified as Win.Trojan.Agent-36166. The embedded JavaScript is heavily obfuscated, but its presence and the ML classifier's high confidence score indicate an attempt to execute a secondary payload.

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` `6884b61c499d15369bee0caba835870ad227152aa25ecbf922e7a5255b8d017f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75125 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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