Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd98bf5a4abc694…

MALICIOUS

PDF

4.1 KB First seen: 2013-06-26
MD5: 617d5c2b6229262ec50574088f3a8ce9 SHA-1: 53f5ae5be9cca6f512cfd6a1918570888b123f1e SHA-256: bbd98bf5a4abc69444d301cbf955b8bf4057ecd3bd5c7b7a8d1707272b4872e5
110 Risk Score

Malware Insights

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

The PDF file was flagged for containing an embedded script payload. While the document body is unreadable and no scripts were explicitly carved out, the presence of an embedded script marker and an embedded file suggests the PDF is designed to deliver and execute malicious code. The XFA form and embedded file heuristics further indicate a non-standard PDF structure often used for exploitation.

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 12829 bytes
SHA-256: ddda602817ec3ad8f377b3135c1fd8f2f30792c123563672b707c726a7e397bc

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