Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c9fa2439258bd7…

MALICIOUS

PDF

75.8 KB
MD5: ad9bd34df70989be92eb43c4bec3f481 SHA-1: 6978b4abdc3f10072c5f7a6eb6ec1b99675491fc SHA-256: 63c9fa2439258bd779881f0424f914ca37ff546bc3242058a8324988d978f1f4
168 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded XFA (XML Forms Architecture) data, which is exploited via CVE-2010-0188, a known vulnerability in Adobe Reader. The embedded script, written in JavaScript, is obfuscated but appears to be designed to download and execute a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded script payload in PDF stream low PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • 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/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000286.bin
69df7e3e25ed39f09f8ed86279d711a1a746d0898e171c29fcb9a7da70b9b691		 pdf-embedded-script PDF raw stream script payload at offset 0x286 76866 bytes

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