PDF malware analysis — malicious · fef33d8f87919540

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: ee25ad4038cdd81ed9fbe719e5f46944 SHA-1: 86275725a7719acca83ae9ae639120ba50bcc0ec SHA-256: fef33d8f879195400a87d913ca1a0aa4fab9e4c064918f6b5ffacdced875d220

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The file is a PDF containing embedded JavaScript, flagged by multiple heuristics and a machine learning classifier as malicious. ClamAV also detected it as Win.Trojan.Agent-36166. The embedded JavaScript is the primary mechanism for malicious activity, likely serving as a downloader for a second-stage payload. The SHA256 hash of the PDF itself is included as an IOC.

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` `02ce5ec676b0145a37510c1e489537120cd0d8551f0db4c14a2327c729faadc3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	76094 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.