Malicious PDF — malware analysis report

Static analysis result for SHA-256 b18c703740455488…

MALICIOUS

PDF

4.2 KB First seen: 2013-06-29
MD5: 47ca53fda9789e525b82d6c18b38fce4 SHA-1: 1cfcbdb938a76c82bba1738e6531261d448f2d85 SHA-256: b18c7037404554881d5c3f60246585b93b97bd1adbda57f7dde6321a8479bfd7
110 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file exhibits suspicious characteristics, including an embedded file and an XFA form. Crucially, a medium-severity heuristic detected an embedded script payload within a PDF stream. This indicates the document is likely designed to deliver and execute malicious code, potentially through the embedded script. The exact nature of the script's payload is not fully discernible from the provided evidence, but its presence strongly suggests a 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 12846 bytes
SHA-256: 63e41e5daa2cc92b3be2b4a299efacf891123ceda4bb7d21a5a524912bdb3aeb

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