PDF malware analysis — malicious · 6e649ed6487b24c0

MALICIOUS

PDF

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

MD5: ebf70c36748cf86344bd8d8fbcd3a904 SHA-1: dcb0d31e99b7a8c15958cdfe0c81076f7f92e24f SHA-256: 6e649ed6487b24c0313ad584a15f8687255e6450dbffe7314a93b3eec304c61b

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, identified by heuristics and a critical ClamAV detection (Win.Trojan.Agent-36166). The JavaScript appears to be obfuscated but is likely responsible for downloading and executing a secondary payload. The ML classifier also strongly indicates maliciousness. Given the nature of the embedded script and the ClamAV detection, the primary attack pattern is likely a malicious attachment delivered via spearphishing.

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` `b4811015e89a3816f120e9cd98e253f37903447ee4d79ff3213d431d43e7a9c4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75112 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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