Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6827f8a4290fbba…

MALICIOUS

PDF

14.4 KB
MD5: 049d1b13ed1c55db9d7bd18fbeb2af47 SHA-1: 0ed8bec7d4977e6ae019a60cf4c25cc48f35686c SHA-256: e6827f8a4290fbba276ca9eaa06739ff53c491488d55daeb2dc2f3853c8e43d7
168 Risk Score

Malware Insights

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

The sample is a PDF file that utilizes XFA forms, triggering heuristics related to XFA exploits. Specifically, the CVE-2010-0188 heuristic indicates exploitation of a vulnerability in Adobe Reader's handling of XFA forms. The embedded URL, while seemingly benign, is present within the document structure. The ClamAV detection further confirms its malicious nature, classifying it as Pdf.Exploit.Dropped-78. The attack pattern involves luring a user to open a malicious PDF which then exploits a known vulnerability to execute a payload.

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.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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/