PDF malware analysis — malicious · 87f79108873de49b

MALICIOUS

PDF

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

MD5: f5bf069cd37175ed336716129bb49562 SHA-1: e62d1513d35d9aa3f7da168bf35c9403c95c7fad SHA-256: 87f79108873de49b1eed03b2175b1b4e819166b7fb1e8288788e2f4991cb4c1b

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by multiple heuristics, including a high ML classifier score and ClamAV detection (Win.Trojan.Agent-36166). It contains embedded JavaScript, which is a common technique for delivering malicious payloads. The embedded JavaScript object, 'javascript_obj0007_000.js', is likely responsible for executing the malicious 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` `5be6e6308d0f5e5379d6a58bcd313b63918c9faeba7e1f75df118c073cb4250c`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74777 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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