Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad7d43f4c3e05fa…

MALICIOUS

PDF

12.7 KB
MD5: 071caf94a972c48c88c11fd115fdc8bd SHA-1: 29e8a45a36b8747c4a1bcb057ffba501dd51dc86 SHA-256: cad7d43f4c3e05fa4fa61f58bc5961c9a14daeff6547299ecc8fea6e628535e5
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell

The sample is a PDF document identified as malicious by ClamAV, specifically detecting it as Pdf.Exploit.Agent-6136306-0. Static analysis indicates the presence of an XFA form with an embedded script payload, exploiting CVE-2010-0188, a known vulnerability in Adobe Reader related to LibTIFF and XFA. The embedded script is likely responsible for downloading and executing a second-stage payload, although its exact functionality is obscured by obfuscation. The embedded URL is likely part of the exploit chain.

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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000359.bin
4a27b65dc21e83aa1da7e7d1baaf945f213cc7bf3c23c88feb31996e669aad40		 pdf-embedded-script PDF raw stream script payload at offset 0x359 12281 bytes

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