Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8cef59959261014…

MALICIOUS

PDF

14.4 KB
MD5: a1e2a654fdcbcafb0e87e989f2cc66cd SHA-1: bd9516792939b5c39bf2f63e2ae48658f7394d00 SHA-256: b8cef59959261014396a7deb74caed9cb6bcfd85c31d7d7472eb74cf7c330f5d
170 Risk Score

Malware Insights

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

The PDF file contains XFA form elements and triggers the CVE-2010-0188 exploit, which is known to target Adobe Reader. The ClamAV detection 'Js.Exploit.HTML-30' and the presence of obfuscated JavaScript within the document body suggest that the exploit likely leads to the execution of JavaScript. This JavaScript is likely a stager designed to download and execute a secondary payload from a remote source, as indicated by the embedded URL.

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/