Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd3d8944d23f746…

MALICIOUS

PDF

44.6 KB
MD5: c07436906953f1bb3f81bd73aa8bfe19 SHA-1: b2fae149d4729b3de77668ac9a4a250bce989080 SHA-256: 7bd3d8944d23f746538358d9a74c8f4a083ec5cbf51c5562f1ab189ed82d7906
114 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for PDF-based malware delivery. The presence of XFA form elements (PDF_XFA) may be used to facilitate the execution of this script.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-1507072 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-1507072
  • 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
eacd5bfcf84e8f706b461af58ca8fecf5a99b4be4408cbdcd1fa963e5fb431da		 pdf-javascript-stream PDF /JS object 7 at offset 0x877 1019 bytes
font_00_sfnt_off000010e9.bin
044efaa0fcddad6a1afc97a6bd112675dff8d542f6a622fb73e7eb17d43d90f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9 65932 bytes

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