Malicious PDF — malware analysis report

Static analysis result for SHA-256 343c76a5ce9e49f5…

MALICIOUS

PDF

99.6 KB
MD5: 5194cc5d4657f1b7fdf1c320134eff24 SHA-1: 8dd88223f13a624672e89e0b3c04d684799ab3d9 SHA-256: 343c76a5ce9e49f5a1064f6dcba9e3f5e326c872b737853854fc2345ee1abcd3
116 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by an ML classifier. Static analysis detected the use of XFA forms and an embedded file, with a critical heuristic firing for CVE-2010-0188, an Adobe Reader LibTIFF XFA image exploit. This indicates the PDF is designed to exploit this vulnerability to gain execution, likely for a secondary payload. No specific family could be identified.

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
0cba56411c49d8d3405180c202bb8f3e79c03ffd4ad256ffaa3960d127a94a1d		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101230 bytes

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