Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a12a56b37c2e6a7…

MALICIOUS

PDF

28.6 KB
MD5: 9b420a71156e02dca6873b2e3cb26a9a SHA-1: a8201c973246da98d337e1a386b8f9048da90ee9 SHA-256: 1a12a56b37c2e6a70c05a1bf57fb50820a7753580930d3c908ce064734ff4868
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 the XFA (XML Forms Architecture) feature to exploit CVE-2010-0188 in Adobe Reader. The heuristic firings indicate an XFA numeric eval stager was used to deliver the exploit payload. The embedded URL, while seemingly benign, is part of the XFA template structure and likely used in the exploitation chain. The ClamAV detection further confirms its malicious nature as Pdf.Exploit.Agent-36825.

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-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
  • 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/