PDF malware analysis — malicious · d1ac3d12eb5e789c

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: 9382e44af45f74095812324967c786ee SHA-1: 2fb2e27386b788191ada989f8e475ed888684359 SHA-256: d1ac3d12eb5e789ca3fa495124a6837a921a7c69705f03c595e2cecff2016e5e

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, which is a common technique for delivering malicious payloads. Heuristic analysis and ClamAV detections strongly indicate that this file is a Win.Trojan.Agent-36166. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although the exact mechanism is not fully detailed in the provided evidence. The presence of JavaScript actions and embedded JS streams, coupled with critical ClamAV detections, supports a high confidence assessment.

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` `83ebb1687cb6043643067db590b32eac1ec0cf00950a24e9f72345e421a3747e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74753 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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