PDF malware analysis — malicious · 9a29807094861275

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: f12fa2eaf861d7974e7c3c02a9a6a1b2 SHA-1: 0f34b1ee9b6892d49c92a0807b647d7bb8ffd296 SHA-256: 9a298070948612752cde6aa3ad06968c373b973e49fdd20df8193ea1d8e29d01

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by multiple engines, including ClamAV which identified it as Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating an attempt to exploit PDF vulnerabilities. The primary function of the embedded JavaScript appears to be the download and execution of a second-stage payload, as suggested by the heuristic firings and the nature of the detected malware family.

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` `c672e06ab7ecc5cb6101b21117b765c122d6eab029dff16734797b2ba48143a5`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75159 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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