PDF malware analysis — malicious · fd9ba3b2432f24f4

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: 84c8fc26a5b5464aabb244334a0c59b0 SHA-1: cf4d8237889cedb526da5ca516be3ae8b0f5e6ca SHA-256: fd9ba3b2432f24f42ca05ccc4267c2f50cfc02005ebc257bbd7105b26160938e

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged by ClamAV as Win.Trojan.Agent-36166, indicating a known malicious signature. Static analysis also identified embedded JavaScript, which is a common technique for delivering secondary payloads. The JavaScript action and embedded JS stream heuristics suggest the script is designed to download and execute additional malware. The exact intent of the script could not be fully determined due to obfuscation.

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` `49b493fa0b3ef2c2f667496cbce29d56f42723c8641da405d42c76eaf418b8af`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74403 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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