Malicious PDF — malware analysis report

Static analysis result for SHA-256 d398db9eae6603f6…

MALICIOUS

PDF

4.2 KB First seen: 2026-05-08
MD5: 65206231dc1682b7365f84a605e750f3 SHA-1: 8c69cdac8f40700c78a255e48c4a464236b8b23e SHA-256: d398db9eae6603f6b205ce857623b1e6fcd15a39a9f51ab9057d136d3ade0d97
110 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of containing malicious content, specifically an embedded script payload detected by heuristics. The presence of XFA forms and embedded files further suggests a complex structure designed to conceal or deliver malicious code. While no specific script content was detailed, the embedded script payload heuristic indicates a high likelihood of malicious execution.

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 12981 bytes
SHA-256: 3ece50913339e5f813ce8bab33efb0e2eb04fcbff8ccd23d2fe160993f56535c

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