PDF malware analysis — malicious · 7af70ef8af1a208f

MALICIOUS

PDF

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

MD5: 124519200987b8a070424f82bc0535c2 SHA-1: a2db06162ba54dc0db9ae8ee9f3442ed1819cf09 SHA-256: 7af70ef8af1a208f973540b218e6442502a2c284da30575b180a4a271a37fd8d

166 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file was flagged as malicious by multiple engines, including a high-confidence ML classifier and ClamAV, which identified it as Win.Trojan.Agent-36166. The embedded JavaScript, although heavily obfuscated, is indicative of a downloader or exploit execution mechanism. The presence of JavaScript actions and embedded JS streams strongly suggests an attempt to execute arbitrary code, likely to fetch and run a further stage.

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` `c6f3775949255b26bd8fb4074bf9630d82285bd40debf519e0157a6294a57692`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74799 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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