Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91aebc00a9464c6…

MALICIOUS

PDF

4.2 KB First seen: 2026-05-08
MD5: 907a077e9d849cdc90138fbb898e87fe SHA-1: 824032df03e06889a8db58edcce9ba79fe3f98b4 SHA-256: b91aebc00a9464c63fea07bf83ace8887c4bc90683293231e307ecbc735fd8b4
110 Risk Score

Malware Insights

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

The PDF file contains embedded script payloads, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The presence of XFA forms and embedded files further suggests a malicious intent, likely to exploit vulnerabilities within the PDF reader to execute arbitrary code. No specific family could be identified, and no IOCs were directly extractable from the provided evidence.

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 13008 bytes
SHA-256: 75c4314c1a2b778f5bef7fcafc7f58ada23883259870f405c2c03aae23eea6b1

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