PDF malware analysis — malicious · 0bcd809ccaa2bf3c

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: fe4e6d428ae8b5642de15dc5b73deae5 SHA-1: a84c6040d398923ebf9b89d79258b51cfd49d236 SHA-256: 0bcd809ccaa2bf3ca12938e6b6d432e7a81b5a54f3d722beb800adba302d7eb9

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for delivering malicious payloads. Heuristics and ClamAV detection confirm the malicious nature of the file, identifying it as Win.Trojan.Agent-36166. The JavaScript appears to be obfuscated but is likely responsible for downloading and executing a secondary stage, consistent with a trojan downloader.

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` `7644d2193322e1843b070ca172106b7e9d13c937ebe6bb062b2889e3855fb498`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74903 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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