Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98c151ff41aa931…

MALICIOUS

PDF

112.5 KB
MD5: 2677547da6c9f098168c041bf664c3aa SHA-1: e6fccd04bdd5caf7eecbb36b9729e0751fb3a0ec SHA-256: c98c151ff41aa9317884ada147838fe20183d1aaa4696aa0bf42c3fdda59bdbd
250 Risk Score

Malware Insights

The file is a PDF document that leverages XFA (XML Forms Architecture) to execute a heap-spray exploit targeting CVE-2010-0188 in Adobe Reader. The embedded script payload within the XFA form is designed to trigger this exploit, leading to arbitrary code execution. No specific malware family was identified, but the exploit mechanism is clear.

Heuristics 7

  • 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.
  • XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY
    PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
  • 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_0000023b.bin
1ca93772d2c2f2fe2d742604523dd2fb5ebf5caadfa0cc0ec7fc451bfb11f6a7		 pdf-embedded-script PDF raw stream script payload at offset 0x23B 114537 bytes

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