Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa569f5bf08a026a…

MALICIOUS

PDF

28.6 KB
MD5: bb0535dfec909007bd83b928afa3782a SHA-1: 35adcd5b74beca61dc1e3b6f4174e4f688663ce5 SHA-256: aa569f5bf08a026ae3f80ba676ee9c4a016638fca99b3d6f366a282822cad804
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 leverages the CVE-2010-0188 vulnerability, which affects Adobe Reader's XFA form processing. The heuristic firings indicate that the file contains an XFA numeric stager designed to evaluate malicious content. This exploit likely leads to the download and execution of a second-stage payload, although the specific payload could not be determined from the static analysis.

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/