Malicious PDF — malware analysis report

Static analysis result for SHA-256 b316f193f00d0dbe…

MALICIOUS

PDF

14.1 KB
MD5: 4552ee77eb1e4f830f5241308e54ef87 SHA-1: cd7113682beb9833a47902249c1c8b6ccbc08919 SHA-256: b316f193f00d0dbeb633b8fbcc12a47b86638cc7f56b21ac7a49103083760d9b
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The sample is a PDF document that leverages XFA forms to deliver a payload. Heuristics indicate exploitation of CVE-2010-0188 via an XFA numeric stager, which is known to execute embedded JavaScript. ClamAV also identified this as Js.Exploit.HTML-30, confirming the presence of malicious JavaScript. The embedded URL is likely related to the XFA template but is not directly indicative of a malicious destination.

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: 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
  • 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/