Malicious PDF — malware analysis report

Static analysis result for SHA-256 115cc2f90c26d5da…

MALICIOUS

PDF

10.0 KB
MD5: b497087b11d73a312d2e54034fba2de1 SHA-1: 4ab9c5f9878f633a71f6c86a34a039204c7c1248 SHA-256: 115cc2f90c26d5dae4bc12c58c3eefda7d9775f478372b864e4a19b5131e0064
106 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 ClamAV and an ML classifier. It contains embedded JavaScript, which is likely intended to exploit a vulnerability and execute a payload. The JavaScript code is heavily obfuscated, preventing a detailed analysis of its specific actions, but the presence of PDF_JAVASCRIPT and PDF_JS heuristics strongly suggests an exploit attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Dropper.Agent-9448145-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9448145-0
  • 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.

FilenameKindSourceSize
javascript_obj0035_000.js
42aab1f5f6f775abaaadfb07394ffb329894a15e31cfb7faa356487ebbfdea3c		 pdf-javascript-stream PDF /JS object 35 at offset 0x17E 21306 bytes

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