Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a11477962ddf24b…

MALICIOUS

PDF

44.6 KB
MD5: bae689ecac665833b71670752ded0c4f SHA-1: 422c76ba5e2210acb80690bcd0cc2146c706119e SHA-256: 2a11477962ddf24b09f3039cde215e2d573e167a816e58de7431091de1c95415
114 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including PDF_JAVASCRIPT and PDF_JS, indicating the presence of embedded JavaScript. The ML classifier and ClamAV detection strongly suggest malicious intent, with ClamAV identifying it as 'Pdf.Dropper.Agent-1828689'. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for PDF-based malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-1828689 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-1828689
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
8b949c584b788a17cd39749e3cd5b80226982936c3e5b40716d5c0862e969687		 pdf-javascript-stream PDF /JS object 7 at offset 0x87C 1040 bytes
font_00_sfnt_off00001103.bin
044efaa0fcddad6a1afc97a6bd112675dff8d542f6a622fb73e7eb17d43d90f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1103 65932 bytes

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