Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf3be1b9dd0d278…

MALICIOUS

PDF

45.1 KB
MD5: 825d7fc9743d4e43599a381455ebf553 SHA-1: ed0d214713d2c6e7ecb99d3b32b1a68c73a7ea01 SHA-256: 2bf3be1b9dd0d2785957d36ee9815d8a9007ff715d2b071f2954ab81a4bfa51a
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further suggests malicious intent. While the document body is unreadable, the presence of JavaScript points towards an attempt to execute arbitrary code, likely for downloading and executing a second-stage payload. The embedded URLs are not directly actionable but are part of the PDF structure.

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
2cd60dfc630c2b3481d826e57e73401b730c9d8934dc654679e5ac828ab0f177		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1FA 3521 bytes

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