PDF malware analysis — malicious · 029c266b156200c6

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: 10352e44696383f0e30b5c41fb79a31b SHA-1: 295f879b08f5915c9a67891c890fa4759443e5fd SHA-256: 029c266b156200c6c1575e1140d3dee2c70b4e746a38bcc5764cba0756615f99

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection for 'Win.Trojan.Agent-36166'. Embedded JavaScript was found, which is commonly used to download and execute further malicious content. The presence of JavaScript actions and streams strongly suggests this technique.

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` `0e3185ce1a825cf59a4c792ff5cc19e9f52471af4e595475209135b3f9bac736`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74186 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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