Malicious PDF — malware analysis report

Static analysis result for SHA-256 002cf880205969ac…

MALICIOUS

PDF

86.9 KB
MD5: f7648671e0fb1129da44e757a7967af8 SHA-1: 22e8a2b7a666c66ba585ab3b3d3a74908728ab1c SHA-256: 002cf880205969ac6d8f859b6ac976b9aff9ed5620c463df8a7f6d4458474015
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File T1059 Command and Scripting Interpreter T1059.001 PowerShell T1190 Exploit Public-Facing Application

The file is a PDF that contains an embedded XFA form, which is known to be a vector for exploits. Heuristics indicate a critical vulnerability, CVE-2010-0188, related to Adobe Reader's handling of XFA forms. This exploit likely serves to download and execute a secondary payload, as suggested by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic and the 'Pdf.Exploit.Dropped-78' ClamAV detection. The embedded URLs are related to XFA specifications and do not appear to be malicious themselves.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
ff231f91fc62597a7c974d8a73e30724c2d38039c30a1f210bf6a5ef94f27f2f		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 88214 bytes

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