Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e0f1852c8cd8da…

MALICIOUS

PDF

97.0 KB
MD5: cd0a586c7c62e6560c6cd598c1fce932 SHA-1: 01a4d4d1a737ed7f6321d2576c0071c6833db72c SHA-256: 32e0f1852c8cd8daaee55fbe7a6bfd66eac83d597ddaadd8fc108e113025000e
230 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 JavaScript

This PDF file contains XFA (XML Forms Architecture) content, which is known to be a vector for exploits. Heuristics indicate a critical vulnerability, CVE-2010-0188, related to LibTIFF and XFA JavaScript. A deobfuscated JavaScript stager (xfa_numeric_stage_000.js) was recovered, suggesting it downloads and executes a second-stage payload. ClamAV detections further confirm its malicious nature.

Heuristics 7

  • 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
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • XFA numeric JavaScript stager high PDF_XFA_NUMERIC_JS_STAGER
    PDF XFA script reconstructs a hidden JavaScript stage from numeric field data or a character table, then evals the result. The decoder is gated on XFA script, numeric staging, and recovered exploit-like JavaScript or shellcode markers.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xfa_numeric_stage_000.js
4e0f84eb4c16c6482d9b4ace985c1bc562773382fdb859dda5e69d9065a584c1
deobfuscated-js XFA character-table decoded JavaScript (raw) at offset 0x2EB 3786 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36962
Obfuscation or payload: likely
Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).