Malicious PDF — malware analysis report

Static analysis result for SHA-256 735e271037a86d4b…

MALICIOUS

PDF

79.2 KB
MD5: 305ac3ff4ce2f695957fc9c644b67235 SHA-1: 3b3ebdcd78234a343d7e8ef876bd86d42c23395f SHA-256: 735e271037a86d4b6add72cf9fcff942853b184d712e05e2e917cb175f1fb039
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded XFA form, which is known to be vulnerable to CVE-2010-0188. This exploit allows for arbitrary code execution within Adobe Reader. The ML classifier strongly indicates maliciousness. The embedded file and script payload markers suggest the PDF is designed to deliver a secondary malicious payload.

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 low 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/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
966f10a4023ce130aa2831872d53495a903ee1134ce76752ad37d35da055a24b		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80367 bytes

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