Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0994bb26bee433…

MALICIOUS

PDF

102.3 KB
MD5: 4bd796bee6c097a4ae30c50692fb603a SHA-1: c386748de90f5c2416049f661d11caaa203c6aab SHA-256: 2f0994bb26bee4335fca3fe2c392b3b619dcd7a1f6f9d0b8f6078c5705592bc3
188 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The sample is a PDF file that contains an XFA form, which is known to be a vector for exploits. Heuristics indicate a critical vulnerability (CVE-2010-0188) related to LibTIFF and XFA, suggesting exploitation for client execution. An embedded script payload was also detected, likely intended to download and execute a second-stage payload, though its exact functionality is obscured by the PDF structure. The embedded URL is likely benign, related to XFA schema.

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_00000346.bin
ceef11249ad576f2f742d5c20cca50e0c44946c5f53754265217e7da293b0d2d		 pdf-embedded-script PDF raw stream script payload at offset 0x346 104065 bytes

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