Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e817cf3a598e59b…

MALICIOUS

PDF

4.1 KB First seen: 2026-05-08
MD5: 5bee2267f260415f725949b9850761ff SHA-1: 3c0e06dc4714c1ca18457b2c277969dbef04482f SHA-256: 4e817cf3a598e59b36db39bed29ff1dff9ed0e374ff06108943cacb42181c37c
110 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an embedded script payload and an embedded file. The embedded file, named 'embedded_file_obj0008.bin', is likely the malicious payload. The XFA form heuristic suggests a potential for exploiting form-based vulnerabilities. The exact nature of the embedded script could not be determined due to its obfuscation or truncation, but its presence strongly suggests malicious intent.

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 12861 bytes
SHA-256: 5ef88f30ab8c403b2b20ba7efba8175d3d5cbf70f36349d39b2708e22cc6494d

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