PDF malware analysis — malicious · 892d0d2e563a42bc

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: 2bb1243839c43ec0e6abaa45d26fa0e9 SHA-1: 672782bd273200332a545ac58453f01d9bbd4368 SHA-256: 892d0d2e563a42bc2ae066515db94a51d3637a8f7067a18aaf613f5a608c2cfd

168 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged by multiple heuristics, including a critical ClamAV detection identifying it as 'Win.Trojan.Agent-36166'. The presence of embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics, suggests an attempt to execute malicious code. The ML classifier also strongly indicated maliciousness. 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` `41a3293c8acb1b3f7a9a2c84284c15a69418d6cdfcaf0e5fb0a835a4df458b74`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74326 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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