Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a50d76a04a56ba…

MALICIOUS

PDF

4.1 KB First seen: 2026-05-08
MD5: 7a63dce6e88293def22cb812665903f8 SHA-1: d475f0b917c861ed426ebd9b9e875d03a48e3432 SHA-256: c4a50d76a04a56ba4af1468fb7b81a8e21e05f46a98e0b48cae93ff96738f645
110 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a malicious document, specifically the presence of an embedded script payload. This indicates the file is likely intended to deliver and execute further malicious code. The XFA form and embedded file heuristics further support the suspicious nature of the document. 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 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 12782 bytes
SHA-256: 9d466eef7cd16dfdbd803b552e3d81138168a6f0c53133b149c684ac2c429ec7

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