Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e834fc530c2e81…

MALICIOUS

PDF

4.2 KB First seen: 2026-05-08
MD5: 3f32c18cf980041d37a686a4b7f634b8 SHA-1: 058de3c6505296ea4dcdf2c8c26f2935952a2328 SHA-256: d4e834fc530c2e81d233be847adf3d424afe719cb4835f9a4c07097f10366b7e
110 Risk Score

Malware Insights

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

The PDF file triggered heuristics indicating an embedded script payload and an embedded file. The presence of these elements suggests the document is designed to execute malicious code, likely for the purpose of delivering a second-stage payload or exploiting vulnerabilities within the PDF reader. No specific IOCs were extracted, and the script content was not available 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 12984 bytes
SHA-256: 5ffc748217e8fee645554f71ae129c3aced729892daaa02e73bf0b54474484a5

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