Malicious PDF — malware analysis report

Static analysis result for SHA-256 9167ab888b05a5bd…

MALICIOUS

PDF

4.2 KB First seen: 2026-05-08
MD5: 5ee8b191d8b1d667e228f7c6e71f4e28 SHA-1: 1e1c18cf8f63b718169b271b3122cdd3e48c0ba4 SHA-256: 9167ab888b05a5bd848cfb323490f9b8f8eb2722a5b5ccea3fe19ef603a5123a
110 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file exhibits suspicious characteristics, including an embedded script payload and an XFA form. The embedded script is the primary indicator of malicious intent, suggesting the document is designed to deliver a secondary payload. The presence of an embedded file further supports this, indicating a potential multi-stage attack. Confidence is moderate due to the lack of specific script content for detailed analysis.

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 info 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/1.0\ In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.5/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xEA 13025 bytes
SHA-256: f3458865857bb61aebc185d3cf6f2710b24c745d80a33b5560eb1e429203fca9

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