PDF malware analysis — malicious · fc87e8a33bf09728

MALICIOUS

PDF

15.1 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: b5768d15aaeecea57d1e3a20e8b9d339 SHA-1: 788a62b31189c8ea071dc29fefa801ee8e23089f SHA-256: fc87e8a33bf09728ad36db9f82bb12f0c7c1bc2c93a76758a5274bcb0a0391a7

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36166) confirm its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for malware delivery via PDF documents. The presence of JavaScript actions and streams points to T1059.001 and T1059.005 as likely execution vectors.

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` `0f89f493404db20715e7558f235441cb2401cbbb529bc7555e3c2ecd8fae199d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	84429 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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