Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f2088828bf5f598…

MALICIOUS

PDF

28.6 KB
MD5: 7406b93d85e62420d6c2f8f72379c646 SHA-1: 97f99985e078c3fc4190b6c52f934542fea745cc SHA-256: 4f2088828bf5f598bc3522cf61c20eae1a02cf5cad235727e80b21546ff06a63
168 Risk Score

Malware Insights

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

The sample is a PDF file that leverages XFA forms and specifically targets the CVE-2010-0188 vulnerability, which is known to affect Adobe Reader's handling of LibTIFF images within XFA content. The presence of an XFA numeric eval stager further indicates an attempt to execute malicious code. The embedded URL, though seemingly benign, is part of the exploit chain. The ClamAV detection confirms its malicious nature.

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/