Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b38ce4c71502e5…

MALICIOUS

PDF

14.2 KB
MD5: db4addda258c01d13fd75d9d1f1e4d8e SHA-1: 7a54b105df7549c9fe008f47b6ae652d24453835 SHA-256: 12b38ce4c71502e5ed04a50bcd10b5e3c15cffd42103df27689107c26a9e414f
200 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains an XFA form that leverages the CVE-2010-0188 vulnerability in Adobe Reader. This exploit is designed to download and execute a second-stage payload, as indicated by the 'Js.Exploit.HTML-30' ClamAV detection and the ML classifier flagging the PDF as malicious. The embedded URL is likely related to the exploit's functionality.

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.
  • ClamAV: Js.Exploit.HTML-30 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Js.Exploit.HTML-30
  • XFA numeric character-table eval stager high PDF_XFA_NUMERIC_EVAL_STAGER
    PDF XFA initialize script reads numeric form data from rawValue, maps the values through a short character table, and evals the reconstructed stage. This is an exploit-kit staging technique even when the final decoded layer remains encoded.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://www.xfa.org/schema/xfa-template/2.5/

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