Malicious PDF — malware analysis report

Static analysis result for SHA-256 664d4b10afd0d406…

MALICIOUS

PDF

99.5 KB
MD5: 77d2eccfd85b145cc06ef051532a0cd2 SHA-1: df1b4db9c5572023470e8b179c7142b417eb69b6 SHA-256: 664d4b10afd0d406589d1d10d0cf1bee833b3562c49c898d8fb8d85d22f5da28
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains an embedded exploit targeting CVE-2010-0188 in Adobe Reader's XFA form processing. This exploit is designed to achieve arbitrary code execution, which is typically used to download and run additional malicious content. The ML classifier strongly indicates maliciousness, and the embedded file heuristic further supports this.

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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_file_obj0008.bin
5684f236ce81110223056aab686c642c46bda748a806ada41a39b50987fac4ce		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101118 bytes

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