Malicious PDF — malware analysis report

Static analysis result for SHA-256 231a50b6970c45ff…

MALICIOUS

PDF

21.4 KB
MD5: 10637cbed13de58537f0b6142a497e70 SHA-1: 1a9ed953dcef7dcfac69ece47d66ad4c3e443c11 SHA-256: 231a50b6970c45ff88288b795756c821a4f32d1ce026ff078f7971e9dbecc5c7
168 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The sample is a PDF file that leverages XFA (XML Forms Architecture) to exploit the CVE-2010-0188 vulnerability in Adobe Reader. This exploit is designed to execute arbitrary code, indicated by the 'XFA numeric character-table eval stager' heuristic. The embedded URL is likely used to download and execute a secondary payload, as suggested by the ClamAV detection name 'Pdf.Exploit.Dropped-78'.

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: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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/