Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be99dfee9247b38…

MALICIOUS

PDF

99.8 KB
MD5: 08e7b1849dc55067eb31e838447a991d SHA-1: eaa72b8b760700406d310c82068094a2323377ef SHA-256: 5be99dfee9247b38e08782e9b9007b9425334255fb340571954c523d0b636dd2
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 contains a critical heuristic for CVE-2010-0188, indicating exploitation of Adobe Reader. The PDF also contains an embedded file and script payload, suggesting it's designed to deliver and execute further malicious content. The benign URLs found are likely part of the XFA form structure and not indicative of malicious C2 communication.

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
b7195b1b0f18b2523e742ad7840071105ac408be256ec26b6f8a164a2d2403e9		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101466 bytes

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