Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0fd48c817de0d98…

MALICIOUS

PDF

45.4 KB
MD5: 97f2b8ac46f8e6ed11e3ec1a9d53df6b SHA-1: b90e9f85fd22823e769a4744ce6da9b4930bab4b SHA-256: f0fd48c817de0d983a73a627e7fbbba40036451146194052027e3794a04d54ba
114 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. While the document body is heavily obfuscated and unreadable, the presence of JavaScript points towards an attempt to execute malicious code, likely for downloading and executing a second-stage payload. The embedded URLs are related to XFA forms, which are sometimes used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9386

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
fe33212eed4742a956530244ebd84b05f1286f2d096432cbbd5d1da8a36ba76a		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1D9 3868 bytes

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