Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d149b3f0737895b…

MALICIOUS

PDF

9.2 KB Created: 2011-04-23 04:12:07 +04:00
MD5: fc0fea741836cde027d8ce7305647661 SHA-1: f775bcd12056448903659c5c82c2ef03565346f0 SHA-256: 8d149b3f0737895be17b0a7d6d436a0e5c036f147830c34562b4bf47d6a3029d
118 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1059 Command and Scripting Interpreter

The PDF file contains an embedded script payload and a launch action, indicating an attempt to exploit vulnerabilities. The ML classifier strongly flagged this PDF as malicious. The embedded script likely attempts to download and execute a second-stage payload from one of the unknown reputation URLs. The XFA form suggests a more complex, script-driven attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 4

  • Launch action high PDF_LAUNCH
    PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
  • Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
  • 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 https://xakepy.cc/index.php
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.w3.org/1999/xhtml
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000642.bin
65f195d95793559c962825531c00c26658edca8e631c201a0e879b629e00f543		 pdf-embedded-script PDF raw stream script payload at offset 0x642 4190 bytes

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