Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5f25edfb4876d8…

MALICIOUS

PDF

4.2 KB First seen: 2013-06-25
MD5: ff5195c29ea0c8ee37fdb88eed0e42c6 SHA-1: 1ecf4bd604ee3b2d7a91d5879481bc7b77d291cb SHA-256: 4c5f25edfb4876d84755432c839010c32f12368a1b7a383f3ea52b5231980eb9
110 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File

The PDF file contains an embedded script payload, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. While the document body is unreadable and no specific script content was extracted, the presence of an embedded script suggests an attempt to execute malicious code. The XFA form and embedded file heuristics further support the suspicious nature of the document. The exact payload and its intent cannot be determined without further analysis of the embedded script.

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 12834 bytes
SHA-256: a15497f2e9b6d587088cbdfff145fbdbe6985c3742afe25b20a99cca79c1f03d

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