PDF malware analysis — malicious · 182db7941fe73fb3

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: 5f69646010279387075522ce08e11ffd SHA-1: ffa7b3241cbaa397c3832e81702233f750abbab0 SHA-256: 182db7941fe73fb3031a8bafa87d1065f0f5cf2cdfb2faf2f9cfa494da539f09

166 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript, identified by heuristics and confirmed in the script section, strongly suggests an attempt to exploit vulnerabilities for client execution. The script itself is heavily obfuscated but appears to be designed to download and execute a secondary payload, as indicated by the string concatenation and the overall structure.

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` `cae2fc84b5c07372d1d647b2ebb322d24bde6a75c09de307b164abdeaa93c9d3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	76595 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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