Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5eafa5b83c6090…

MALICIOUS

PDF

78.8 KB
MD5: 33f6a02f35c4b74d37e3fc479d19b9af SHA-1: 2c2814f820574281c783e3b613a4f88d2487dc47 SHA-256: 6c5eafa5b83c60903e4dfc2b9c8fdb2e6f947ba8f1ca82d3ba4ddc790e9ebdf1
116 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by an ML classifier and heuristics. It exploits the CVE-2010-0188 vulnerability in Adobe Reader's handling of XFA forms, which is a known method for achieving arbitrary code execution. The PDF also contains embedded scripts and files, indicating a multi-stage attack. No specific family could be identified, but the exploit vector is clear.

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
21524d0ec30bcb7d4bb8f9072b0bef3f24925509237b08c70872bac26c5fb1bd		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 79917 bytes

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