Malicious PDF — malware analysis report

Static analysis result for SHA-256 618b5dd334183ba0…

MALICIOUS

PDF

100.0 KB
MD5: 1eda4d57cfa5f1d2420a61adcbdd37a3 SHA-1: 09ac8aa3a59b127446366f6975129b792b0a7b9f SHA-256: 618b5dd334183ba0fa78cfcb11e6ad1e32464b99c60169efddeeaeed78139bda
116 Risk Score

Malware Insights

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

The PDF sample contains an embedded file and triggers a critical heuristic for CVE-2010-0188, an Adobe Reader LibTIFF XFA image exploit. This indicates the file is designed to exploit a known vulnerability for client-side execution. The ML classifier also strongly flagged this PDF as malicious. The embedded file and exploit suggest a downloader or dropper functionality, though no specific family is identifiable.

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
75b152d1c95c1d9a50d816606b8fb4050cb98c009fa9e3d996dcec77c687e40d		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101679 bytes

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