PDF malware analysis — malicious · bd805a868cb5675c

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: 3bbeaed877000e0e45b0665110161bf4 SHA-1: c0538a7dd8317a8a53661a3f45363dc2adcf556c SHA-256: bd805a868cb5675cedbd626e0012cc24314bad5f85b19e293c8594720946946d

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, triggering heuristics for PDF_JAVASCRIPT and PDF_JS. A critical ClamAV detection of 'Win.Trojan.Agent-36166' on both the main file and an extracted artifact strongly suggests malicious intent. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, consistent with the ClamAV detection.

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` `f3b9e3c911321e9cbe4a36da4b0ab9b247ee2d857f92dbe47cb33f4e8af83b29`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74369 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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