PDF malware analysis — malicious · 169347d8e0fd715d

MALICIOUS

PDF

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

MD5: a54e7eaf77d44601d1188fdac43dd6dc SHA-1: e7772828f8153c30cd39b8cd29b4004bdcbf4aa0 SHA-256: 169347d8e0fd715de1eb840334743b6f618ba2e35fd31470dc36ba045b0934c9

166 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file was flagged as malicious by multiple engines, including a critical ClamAV detection for 'Win.Trojan.Agent-36166'. The presence of embedded JavaScript, identified by multiple heuristics, strongly suggests an attempt to exploit vulnerabilities and download a secondary payload. The obfuscated JavaScript code, though truncated, indicates malicious intent to execute code. The file's nature as a PDF with embedded scripts points to a likely delivery via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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` `9c61814a777629df70e32af6aaaa1fdac150cc956a9b23e8d4802e15108db35d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74358 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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