Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc5e858dd118b993…

MALICIOUS

PDF

79.7 KB
MD5: d079b91d6d8b5d1fc75448bd0b94d23e SHA-1: d3169e5aa2cad2e620f55113cc916237e8867d0f SHA-256: dc5e858dd118b9935486732553d4e20329c452f495dd8fcaf1dc2cd35b0a8a18
188 Risk Score

Malware Insights

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

The file is a PDF document that leverages the CVE-2010-0188 vulnerability in Adobe Reader's XFA form processing. The embedded script payload, detected by ClamAV as Pdf.Exploit.Agent-6136306-0, is likely responsible for downloading and executing a second-stage payload. The presence of XFA forms and embedded scripts strongly indicates a malicious intent to exploit the user's software.

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.
  • 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.
  • 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_pdf_script_00000288.bin
4d5f247001d68fe41e5cf9755e8dbb0e23814b2526921e76499f651b8afda6fd		 pdf-embedded-script PDF raw stream script payload at offset 0x288 80900 bytes

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