PDF malware analysis — malicious · 256f7295bb6bb18b

MALICIOUS

PDF

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

MD5: 60853aebd72c84f64819f0ca29b0c795 SHA-1: f3d39e6b8b8b51f8d16f51ee9f2d06be91bab7f3 SHA-256: 256f7295bb6bb18b02ee476a0621e299e4eceafc4a5b28b3a7d99b10974c5eae

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating a likely attack pattern of downloading and executing a secondary payload. The document body content was unreadable, but the presence of JavaScript and the ClamAV detection strongly suggest malicious intent.

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` `3257e10a464d0940670e9d2b8518b800fc204e0e0df2b8e50a6b4de0949b6c7d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74532 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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