Malicious PDF — malware analysis report

Static analysis result for SHA-256 363e40b8afe7d1f3…

MALICIOUS

PDF

45.3 KB
MD5: 73f6b3e8ba48884861f4aacbc808ebf9 SHA-1: 9dbcb627dcbe13ba40f9e8f711033b540e718a32 SHA-256: 363e40b8afe7d1f3f99c0e0eea2340ba5626f06ca2c50780d380466a5b8c7446
84 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ClamAV detection of 'Heuristics.PDF.ObfuscatedNameObject' further suggests malicious intent. While the document body is heavily obfuscated and unreadable, the presence of JavaScript points towards an attack pattern involving the exploitation of PDF vulnerabilities to run arbitrary code. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, though its exact function cannot be determined due to obfuscation.

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
74970aad7c95f414c1f8c40f6b6cba25b05c08ae78f096d26a3b791b03a62ac3		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1EE 3664 bytes

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