PDF malware analysis — malicious · 5f946308d9f3f74e

MALICIOUS

PDF

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

MD5: e613c80796faa7b69a524343da7f713a SHA-1: 8154c88db4926292bac21dca995add1c178c0156 SHA-256: 5f946308d9f3f74e9d9ca44ff3e887b8c58374444ac53e8978c4af5db4c529b9

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by multiple engines, including ClamAV which identified it as Win.Trojan.Agent-36166. Embedded JavaScript was detected, indicating the likely execution of a malicious script. This script is responsible for downloading and executing a second-stage payload, a common technique for malware delivery.

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` `b04d1d7ab429cc6e81b9f363943566277f0f41e1feb0dd7652b165c4814a9670`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	76099 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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