Malicious PDF — malware analysis report

Static analysis result for SHA-256 061b50e476581fa4…

MALICIOUS

PDF

14.2 KB
MD5: 17b6844a6eaf1e2f2aa0868925fa30b3 SHA-1: 660575e23d277743f550cc9f797eb0cdd16d1e34 SHA-256: 061b50e476581fa4815537fcbea43d084bfc40368ee8183897e5c57345b065f7
202 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is a PDF document identified as malicious by multiple heuristics and a machine learning classifier. It specifically triggers the CVE-2010-0188 exploit related to Adobe Reader's handling of XFA forms and TIFF images. The embedded URL, while likely benign on its own, is associated with XFA templates and may be used in conjunction with the exploit. The ClamAV detection of Js.Exploit.HTML-30 further supports the malicious nature, suggesting JavaScript-based exploitation, common in XFA documents.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/

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