Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88cabdff2df459e…

MALICIOUS

PDF

21.4 KB
MD5: 4eac15e329ccb3a5970ea53f9a6b32b2 SHA-1: 03c09bb1f7e5a31770fa643847919a994bcb98eb SHA-256: b88cabdff2df459e5c714968c7fea3addccf403d4fa6a7b262f15a3b87f85bf1
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 identified as malicious by ClamAV (Pdf.Exploit.Dropped-78). Static analysis detected multiple critical heuristics related to XFA forms and the CVE-2010-0188 exploit, indicating it attempts to leverage a vulnerability in Adobe Reader's handling of XFA forms and LibTIFF. The embedded URL is likely related to the exploit delivery mechanism.

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/