Malicious PDF / .000 — malware analysis report

Static analysis result for SHA-256 789e8135681a9c3e…

MALICIOUS

PDF / .000

3.3 KB
MD5: 4cf1ebd52ebc20175064d38a94640bc4 SHA-1: aae958f5be3c9c993f5750b0c73923ec84ffcc5e SHA-256: 789e8135681a9c3e5da26019e345036eb42789c551a1a5b090f66e08cc5eeeb6
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF sample contains embedded JavaScript, identified by heuristics and a critical ClamAV detection for 'Pdf.Exploit.Agent-36121'. The JavaScript code reconstructs a string from the PDF's info title and executes it, a common technique for exploiting PDF vulnerabilities to download and execute further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36121 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36121
  • 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_obj0007_000.js
202d662ab5e7e462e1e8da4df52360d1ca049ef95523d2abbafd5a27b162ea71		 pdf-javascript-stream PDF /JS object 7 at offset 0xA95 332 bytes

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