Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34a6bf585d29bcd…

MALICIOUS

PDF

14.5 KB
MD5: 8ab6a1c6d29a4e831d32a131d254e299 SHA-1: f6430d68a101599ec30ff5d3b7bfad9cd0c9f9de SHA-256: e34a6bf585d29bcd2fe0b5fba0a283526485ebd93f48146eb7296bed86755eb4
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The sample is a PDF file that leverages XFA forms to exploit CVE-2010-0188, a known vulnerability in Adobe Reader. The XFA numeric stager indicates an attempt to evaluate and execute code. This exploit is commonly used to download and execute a secondary payload, hence the high confidence in the attack pattern. The embedded URL is likely related to the exploit or payload delivery.

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/

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