PDF malware analysis — malicious · 99ce0dfc3f2b84ba

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: fc46ac23b75fbd6d914be0de0ed3498b SHA-1: f6437b56f3cc1796e63c92c9e1d3c1c1a8240140 SHA-256: 99ce0dfc3f2b84baf068c72db305b9f1b3eab71393ae06cd3fe525db0cb81ab6

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, a common technique for delivering malicious payloads. Heuristic analysis and a machine learning classifier strongly indicate malicious intent. ClamAV detection confirms this, identifying the file as Win.Trojan.Agent-36166. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

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` `e70e7da9f42f13b075001ba4dbfc90ef2e61a2fd73e7de434fe8f81c0cf0d113`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74358 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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