Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a7d082455f4c4b8…

MALICIOUS

PDF

4.1 KB
MD5: 8c36692e76558f245ba9c9902fe5bff5 SHA-1: 6d79bdc2395c2b6a4e23f58d0c427fd2f93325aa SHA-256: 5a7d082455f4c4b8af11ae9cfb96f549a0aba849dbf8ab46efdbc9517b48f6b2
116 Risk Score

Malware Insights

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

The PDF sample contains an embedded XFA form that triggers the CVE-2010-0188 exploit. This exploit is known to be used for arbitrary code execution, typically to download and run a second-stage payload. The ML classifier strongly indicates malicious intent, and the embedded file further supports this.

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/1.0\
    • 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
89db7d72eb74701327160d3397b09bfde5a024b83909a22c92ff2fbb03acccce
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xEA 12630 bytes