Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6f26f2a8b57f7b…

MALICIOUS

PDF

44.4 KB
MD5: af6b71b2ba0e9dc903dc2ce677ffb5ed SHA-1: c9495ecd3f29e7ab89147cefefeafb826373fc26 SHA-256: bb6f26f2a8b57f7ba3d465d9187fd7c3aaa7d40d9292352dadd82657307a14bc
114 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ML classifier and ClamAV detection strongly suggest malicious intent. While the document body is unreadable, the presence of JavaScript points to an attempt to execute arbitrary code, likely to download and run a second-stage payload. The specific URLs extracted are related to XFA, a PDF form technology, but their reputation is unknown or benign, suggesting they are not the primary malicious indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-1506721 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-1506721
  • 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
ff9d3558b9a412e2d0355ac260f209bdd5c7d44ff1ab3be00912ecef78d52578
pdf-javascript-stream PDF /JS object 12 at offset 0xA1EA 2958 bytes