Malicious PDF — malware analysis report

Static analysis result for SHA-256 956233974a736c0d…

MALICIOUS

PDF

4.1 KB First seen: 2012-09-24
MD5: 884b363a29c682f9fe8f64a06daa160d SHA-1: 25e7b6ea109a228e1e9f8189f62eb6ac30528522 SHA-256: 956233974a736c0dca0a7fc6ef19597fba7f5e9328adaeab46d63772170b891c
110 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file exhibits suspicious characteristics, including an embedded script payload and an embedded file object. The presence of an embedded script payload suggests an attempt to execute malicious code when the document is opened. The XFA form and embedded file further indicate a non-standard structure, often used to conceal malicious content. Without further script content, the exact payload and delivery mechanism remain unclear, but the overall pattern points to a malicious document designed to exploit users.

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/@ 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 12920 bytes
SHA-256: a1203ac5368dfbc674b84cebf86272f33e3daa834495225ccd458d0c57c9a269

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