PDF malware analysis — malicious · e2d51ce83b9d9be7

MALICIOUS

PDF

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

MD5: 2bb66fa6eaaad5d650cb2c5732341c09 SHA-1: 4672dad966dbe3bd810465e5fe5261eb7c27c6fe SHA-256: e2d51ce83b9d9be719c6be98921cf6324935860d8d94e0832628d19abcb84ed8

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, as indicated by multiple heuristic firings. ClamAV detections confirm its malicious nature, identifying it as 'Win.Trojan.Agent-36166'. The embedded JavaScript likely serves to execute malicious code or exploit vulnerabilities within the PDF reader, leading to the download or execution of further malicious content. The presence of JavaScript actions and streams strongly suggests an attempt to compromise the user's system.

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` `8c764f60815c2bb1a09af6d9afe89efe5963d4cf00897579c47bfdc34cc9d83f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	76171 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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