PDF malware analysis — malicious · 6c69e678d4cbccf7

MALICIOUS

PDF

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

MD5: 7b30445fef78abf7af6cc0ccf3a734b9 SHA-1: 481d06378d77b794631ee7c8b2245f0b808dd45c SHA-256: 6c69e678d4cbccf77d80bf4810fd08c01848c765df64ed2566ba9eaff4ab0c1f

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a PDF file flagged as malicious by multiple engines, including ClamAV which identified it as Pdf.Exploit.Agent-14808. Static analysis revealed embedded JavaScript, indicating an attempt to exploit vulnerabilities within the PDF reader. The JavaScript code, though obfuscated, appears to be designed to download and execute a secondary payload, as suggested by the ClamAV detection of Win.Trojan.Agent-36166 on an extracted artifact. The presence of JavaScript and the exploit detection strongly suggest a client-side execution attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Exploit.Agent-14808 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-14808
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` `bf1a5004166c3b839d07ed2b9b07413ae6a55abe48eb164b0579a5f70a850d7d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	76603 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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