Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4e04f8330757b1…

MALICIOUS

PDF

4.1 KB First seen: 2026-05-08
MD5: 6059ba2732e61f4e69f4b61fe2bad0e5 SHA-1: b22bd86f5f8b1e93de03727221ab4464b8dc1c30 SHA-256: aa4e04f8330757b1fa9f0739eb3508f79f13a607d7719b9ea8c8b770456c9671
110 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1553.005 Mark-of-the-Web Bypass

The PDF was flagged for containing an embedded script payload. This suggests the document is designed to deliver a secondary malicious file, which is a common technique for malware distribution. The embedded file artifact further supports this assessment. The XFA form and general embedded file heuristics are less specific but consistent with this type of attack.

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 12558 bytes
SHA-256: cafbbd84e2293b06ea3cea0d092dd6db2a113107c376c225ffb49b8cf2976944

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