PDF malware analysis — malicious · a159e14cc49ddc8b

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: 7ef45b19fd6f61a1e69030096aac9dc3 SHA-1: c7e45a70205e51e4b2436e4ba93cf401a1166e51 SHA-256: a159e14cc49ddc8b0f42a109fbacf30110e73cf979828a632e1f3c2daa1e3ac3

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The file is a PDF document that contains embedded JavaScript. Heuristics indicate the presence of JavaScript actions and embedded JS streams. ClamAV detections confirm this is a malicious file, specifically identified as Win.Trojan.Agent-36166. The embedded JavaScript is the primary mechanism for delivering the malicious payload, likely by downloading and executing a second-stage artifact.

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` `16ca0b598c20dc86a2bccce11a62f22d29eefea1b2f4d737ddcdf7b159af846b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74364 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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