Malicious PDF — malware analysis report

Static analysis result for SHA-256 5472748131845551…

MALICIOUS

PDF

28.6 KB
MD5: 8f3a65d234de1fc2fea9b056701fcb4e SHA-1: 64f2c338abcd1b68f5dc48a40d7d66f9b7d2e2bd SHA-256: 54727481318455517c8536b8499c15ef0bfc49a988e9ce6577335fca66b6692c
170 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: PowerShell

The sample is a PDF file that leverages the CVE-2010-0188 vulnerability, a known exploit targeting Adobe Reader's LibTIFF component via XFA forms. The heuristic firings indicate an XFA form with a numeric eval stager, strongly suggesting the exploitation of this vulnerability. The embedded URL, while seemingly benign, is part of the XFA template structure and may be used in conjunction with the exploit. The primary attack vector is user interaction with the malicious PDF, leading to code execution.

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-36825 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36825
  • 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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