Malicious PDF — malware analysis report

Static analysis result for SHA-256 d33a8130e688a6fb…

MALICIOUS

PDF

79.8 KB
MD5: bc321be551b8126619abb807e0b1e5e8 SHA-1: 5b7308443fab2929f8cd1e5ba4c7e1d9e7ad719f SHA-256: d33a8130e688a6fb36d0ce7fea85cdca6cba940df14999ab3f44a6c96ec9e864
188 Risk Score

Malware Insights

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

The PDF file contains an XFA form that exploits CVE-2010-0188, a vulnerability in Adobe Reader's LibTIFF processing. The embedded script payload, which is 81027 bytes in size, is likely responsible for executing the exploit. The embedded URLs are related to XFA schema definitions and are not directly indicative of malicious activity, but the presence of an exploit and embedded script strongly suggests malicious intent.

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
a9c5db959f8414353769c02c441f7df4bbcee2dcff3cb0c0c30435fdecf62de4		 pdf-embedded-script PDF raw stream script payload at offset 0x288 81027 bytes

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