Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d17a485df344653…

MALICIOUS

PDF

17.9 KB
MD5: 64beb43b6065dbf0db08fcd1b98b8c7f SHA-1: 815ffbeaa1933bfb2335e16a8be78d145bc0fa89 SHA-256: 8d17a485df3446538a3c10714166624cb6c80cc94bc85438bf7934928aa82faa
170 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1204.002 Malicious Link: Clickjacking

The sample is a PDF file that utilizes XFA forms and is detected as malicious by ClamAV. Critical heuristics indicate exploitation of CVE-2010-0188, a known vulnerability in Adobe Reader related to LibTIFF processing within XFA forms. The embedded URL, while seemingly benign, is part of the XFA structure and likely used in conjunction with the exploit to download or execute a secondary payload. The obfuscated document body content further suggests malicious intent.

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.Agent-36831 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36831
  • 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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