Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb41a3a4da22018…

MALICIOUS

PDF

4.2 KB First seen: 2026-05-08
MD5: 9114ac4b001106fd390412f71814100e SHA-1: 4a9e312350264d7d18a6ccc5fe0179da94384465 SHA-256: dcb41a3a4da22018a40edf612771db98d6bd2f6e3b675afdb948a9e63391e25a
110 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file exhibits characteristics of malicious intent, specifically the presence of an embedded script payload within a stream. This payload, identified as 'embedded_file_obj0008.bin', is highly suggestive of a downloader mechanism. The XFA form and embedded file heuristics further support the likelihood of this document being used to deliver further malicious content. The exact nature of the script's execution is not fully discernible due to obfuscation, but its presence strongly indicates a multi-stage 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 13011 bytes
SHA-256: a73aec4127f791ec14da2ccc0febc1daea98eb1081134fa96128ace5046bbfaa

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