Malicious PDF — malware analysis report

Static analysis result for SHA-256 82c0b7ae097be988…

MALICIOUS

PDF

17.9 KB
MD5: c4a34d92be7e257f8c289e73b56023c4 SHA-1: d3b25d9b1e36cafb6d2217fde958475343019ba7 SHA-256: 82c0b7ae097be988f429c8baf802e744839aa295a2b9fe5dceea819f2ed689c3
168 Risk Score

Malware Insights

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

The sample is a PDF file that leverages XFA (XML Forms Architecture) to deliver a malicious payload. Heuristics indicate a critical vulnerability exploit (CVE-2010-0188) related to XFA forms, specifically targeting Adobe Reader. The embedded URL, while seemingly benign, is part of the XFA structure and likely used in conjunction with the exploit. The ClamAV detection further confirms its malicious nature as Pdf.Exploit.Agent-36831.

Heuristics 5

  • 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
  • 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/