Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9dd1357ab595fa…

MALICIOUS

PDF

4.2 KB First seen: 2013-06-25
MD5: 5ec95c08d606ea82114602a72c0287df SHA-1: 6875060dcd3c64507aadb7579592cb033f9d95ed SHA-256: 8c9dd1357ab595fac6e5fc003a4e139e126f7ce5411ee9c1f4d5fea2211c2bf4
110 Risk Score

Malware Insights

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

The PDF file exhibits suspicious characteristics, including an embedded script payload and an embedded file object. The presence of these elements strongly suggests an attempt to deliver a malicious payload. The XFA form and embedded file heuristics further indicate a non-standard PDF structure often used for obfuscation or exploitation. The embedded script payload is the primary indicator of malicious intent, likely serving as a dropper for further stages.

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 12916 bytes
SHA-256: fd52a2e5d93e5dfeb4eec15083e792613ffb97e64191a34638bea785eaadb0e6

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