PDF malware analysis — malicious · a5d340bcd11fe169

MALICIOUS

PDF

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

MD5: 157700653d6f0df2575887e68be451f1 SHA-1: f7117066fab032ac1513038edbd8a0cb5ea2b15e SHA-256: a5d340bcd11fe1693bedd70f10465e786eaab5f5358e10080ff37662f9f67af1

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The critical ClamAV heuristic firings indicate the file is recognized as Win.Trojan.Agent-36166. Additionally, the PDF structure contains embedded JavaScript, which is a common vector for exploiting vulnerabilities and delivering malicious payloads. The document body is unreadable, but the presence of JavaScript and the ClamAV detection strongly suggest a malicious intent, likely to download and execute further stages.

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` `a56d674a77bc08f83a15a3eb31eabdffc17c623583e2cdaec7c3176598403076`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74739 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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