Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cbc9ccde35142ae…

MALICIOUS

PDF

4.2 KB First seen: 2026-05-08
MD5: 3bbbd3bd36a9972c6c43206df79b7698 SHA-1: 8aa020f9c1acd08245cdc8758430b9c96f179ec0 SHA-256: 1cbc9ccde35142ae034b3156c065e43dba46f636311392d5168642ff18267730
110 Risk Score

Malware Insights

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

The PDF file was flagged for containing an embedded script payload. This indicates the document is likely intended to deliver and execute malicious code. The presence of an embedded file further supports this, as it could contain the actual exploit or malware. The exact nature of the script could not be determined due to its obfuscated or compressed nature.

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 13034 bytes
SHA-256: ca3c75ba2b4cd6f96c84e7041e604be00dc3ad3dedda35ca580e4d0908c67b41

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