Malicious PDF — malware analysis report

Static analysis result for SHA-256 247c9d94ce492de5…

MALICIOUS

PDF

45.2 KB
MD5: 3fbfdf4168287c26419cc8ffbb4918fe SHA-1: a3c72ecf70c229c26395a04e430dcd5ae05ae9aa SHA-256: 247c9d94ce492de5a4e8b18ba85af233530ad8aaacd64a44a841a32fb706d212
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by ClamAV with 'Heuristics.PDF.ObfuscatedNameObject', indicating malicious obfuscation. Embedded JavaScript streams were also detected, suggesting the execution of arbitrary code. The presence of XFA forms and JavaScript actions points towards a sophisticated attack vector. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although its exact function is obscured.

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
6e92a8956e6157ea67ebd70dd60f078a7e186dbe24fe9004db2497b5d5dca196		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1E3 3628 bytes

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