PDF malware analysis — malicious · ffbd8de524bda4e8

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: 3e022664dda4173a0ee2e7c4dccd3b79 SHA-1: 661163976313a35d7e6c3b042e12d77ba03e29fd SHA-256: ffbd8de524bda4e89352d26f39747211ea8c031ad7e43aef55bcfa0c80fa7164

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by ClamAV as Win.Trojan.Agent-36166, indicating a known malicious signature. Heuristics also identified embedded JavaScript, suggesting the file's purpose is to execute malicious code. The JavaScript is likely responsible for downloading and executing a second-stage payload, which is a common technique for malware delivery.

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` `0bb8218667ec2d0a44fee1ef1b22eb2aceb44d01ae31d7e007543910e9de44bf`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75139 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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