Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb0d64e4586549e…

MALICIOUS

PDF

14.2 KB
MD5: 737a582c72124725eeb4863490cdca4d SHA-1: 227adf4dbc9f5b798c57f491c071d59cf151f838 SHA-256: dfb0d64e4586549ede2749d5f55da9d599e5dce2ce829927a3ca28da80302f41
170 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.001 Phishing: Spearphishing Attachment T1204 User Execution

The sample is a PDF file that leverages XFA forms to deliver a payload. Critical heuristics indicate an exploit for CVE-2010-0188, a known vulnerability in Adobe Reader's LibTIFF handling within XFA forms. ClamAV also detected it as Js.Exploit.HTML-30, suggesting JavaScript-based exploitation. The embedded URL points to an XFA schema, further supporting the attack vector. The primary intent appears to be the execution of arbitrary code via the identified exploit.

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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