Malicious PDF — malware analysis report

Static analysis result for SHA-256 73995e21df027696…

MALICIOUS

PDF

79.1 KB
MD5: dd21295bd453cb969b3c4d484142e836 SHA-1: b9ffd711c65d8dc111ec67b9269c26e1c7bf77d7 SHA-256: 73995e21df02769604987031aa8928e42ffe09550af1a09e529fab5104f6e320
116 Risk Score

Malware Insights

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

The PDF file contains an embedded XFA form and triggers the CVE-2010-0188 exploit, indicating it's designed to compromise systems running vulnerable versions of Adobe Reader. The ML classifier strongly flags this PDF as malicious. The exploit likely facilitates the execution of a secondary payload, though no specific download URLs or scripts were directly extracted from this sample.

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
5a781d6cd4b3ab2c3fcc7f4db8765c7c5c509e0746ddbc8ccd3eae11ad15f847		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80269 bytes

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