Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5d9e2ed91ee183…

MALICIOUS

PDF

4.1 KB First seen: 2026-05-08
MD5: 93d81084916a673fb03b0fba46a263fb SHA-1: ff688fc36def942497cace82b674918c2b5fcb8d SHA-256: ac5d9e2ed91ee183b98aac9a5d20373725947e37f313d0ac24229e09617b78be
112 Risk Score

Malware Insights

MITRE ATT&CK
T1557 Adversary-Controlled Chain of Trust

The PDF file contains an embedded script payload and an embedded file, as indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'PDF_EMBEDDED' heuristics. The embedded file, named 'embedded_file_obj0008.bin', is likely intended to be executed by the script. The document body is unreadable, but the presence of these elements strongly suggests a malicious delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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: b6584f40bd1f1c7d4dae07a5ee9570de793e5c0d1106e4b2ba912f1c7838b28a
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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