PDF malware analysis — malicious · 769d92c3294869e9

MALICIOUS

PDF

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

MD5: c4fda326399160225114954e19381f8b SHA-1: 8c1d0bdfce5834cd3238e90c8ee89ce67141040e SHA-256: 769d92c3294869e9282f5c58b57f52f5ebffdcd2a4941cd4864083829afdcb05

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is heavily obfuscated but appears to be designed to download and execute a secondary payload. The ClamAV detection name 'Win.Trojan.Agent-36166' 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` `aad48ffc880f7b3ad7b571f21f761d970fa6374ecf0d748e77da03a7e79c03e5`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74556 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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