Malicious PDF — malware analysis report

Static analysis result for SHA-256 04905989c7f1c5d6…

MALICIOUS

PDF

99.7 KB
MD5: 05c25aa668226f9b7ecf2dcf711e3ec6 SHA-1: 907ae6481fa034a8b4d452771d8ea9efcc0248ce SHA-256: 04905989c7f1c5d65b8b023031d1e16ca7fe668b3dc8ca4119bd54a9f0117dae
116 Risk Score

Malware Insights

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

The PDF file contains an embedded script payload and triggers the CVE-2010-0188 exploit, which is known to be used for client-side code execution. The ML classifier strongly indicates maliciousness. The exploit likely serves to download and execute a secondary payload, though no specific URLs for this are present in the provided evidence.

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
8844be361cc5f85f7f42bb5c68cdbaf117ec37bd584ab5356721aeaff40a79f3		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101304 bytes

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