Malicious PDF — malware analysis report

Static analysis result for SHA-256 937b5381f27c7d33…

MALICIOUS

PDF

12.8 KB
MD5: beb33bbf115d8dc026a5cbb267747508 SHA-1: 0f45852236dc1ebcb5483cebf9b24800b7bbac09 SHA-256: 937b5381f27c7d3362bce139233bf3e4b83ff392230d75acf5a2c78768040b70
188 Risk Score

Malware Insights

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

The sample is a PDF file that leverages the CVE-2010-0188 exploit targeting XFA forms. The embedded script payload, located at offset 0x384, is likely responsible for executing the exploit. The heuristic firings strongly indicate a malicious PDF designed to exploit Adobe Reader vulnerabilities. The embedded URL is likely part of the exploit chain or a secondary payload delivery mechanism.

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_00000384.bin
3bac47fb076b511ec1c1ab0d29024aef966705f0d650d23d8a074648f0e3f82d		 pdf-embedded-script PDF raw stream script payload at offset 0x384 12288 bytes

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