Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e5afbca4f78dc8…

MALICIOUS

PDF

50.8 KB
MD5: f364a7f3d656bc54e7f5f54ad3e3244e SHA-1: 0dd2c1f70cf097694e2f6c02c17e89422e233221 SHA-256: c5e5afbca4f78dc8d0dc3abede24d5131e015da55b9f254fa5079b0f219ab147
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter

The PDF file contains XFA (XML Forms Architecture) content, which is known to be a vector for exploits. Heuristics indicate a critical vulnerability exploit for CVE-2010-0188, related to Adobe Reader's handling of XFA forms. The file is also flagged as containing an embedded script payload within a PDF stream. ClamAV detection further confirms its malicious nature. The embedded file and script suggest the document is designed to deliver a secondary payload.

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.
  • XFA form contains executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose dataset contains a <script> or <xfa:script> block — XFA scripting has been the exploit primitive for several Adobe Reader RCEs (CVE-2010-0188 family, CVE-2018-4901, and others). Plain XFA without scripts is far less risky.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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
60bec92a3dcde4a405fb3e21482d637b4b6ba6b290717aca385a86e978b30285		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 51221 bytes

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