Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c97acbad6254ed…

MALICIOUS

PDF

14.3 KB
MD5: dc5a85bf6cac76d14efeb06a0561e946 SHA-1: e2fa66bb05b38c06a0f3811b18a3b95371ed7281 SHA-256: a5c97acbad6254ed325be64324d5ff1514b7bd672fe05808a6801eda6ec75904
170 Risk Score

Malware Insights

MITRE ATT&CK
T1190 Exploit Public-Facing Application

The PDF file contains XFA (XML Forms Architecture) content, which is known to be a vector for exploits. Specifically, the CVE-2010-0188 heuristic indicates exploitation of a LibTIFF vulnerability within Adobe Reader's XFA processing. The embedded URL, while seemingly benign, is associated with XFA templates and could be part of the exploit chain. The ClamAV detection further confirms the malicious nature of the file. The document body contains obfuscated JavaScript-like code that likely attempts to download and execute a second-stage payload.

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: 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
  • 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/

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