Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8bbcf0e41d1052…

MALICIOUS

PDF

44.7 KB
MD5: 8f83ebffec7f5202ff51932110b17daa SHA-1: ca3f3181af9103d6f9f1f81a4839382067850f2c SHA-256: fc8bbcf0e41d1052489dd763b56091ff8203b819d737102406604d9b87c39469
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript T1559.001 Component Object Model

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV also flagged it as Heuristics.PDF.ObfuscatedNameObject, suggesting malicious obfuscation. The embedded JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to download and execute a secondary payload. The presence of XFA form elements (PDF_XFA) further supports the complexity and potential for exploitation within the document 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
5ad05b03c0ce0145bcc0002dba7bcba4248d99f572845f5409d23b64425c8ff9		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1D6 3302 bytes

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