Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b9f8c8b9c20e2d…

MALICIOUS

PDF

111.1 KB
MD5: 7929ccb7ddae5cb5684be24efad5ac5b SHA-1: 3e209409391497b5ddf84b2005265736a642096e SHA-256: c4b9f8c8b9c20e2de2f3986e05f003b55ae52730667109de91f4fea2915e98a5
248 Risk Score

Malware Insights

The file is a PDF document that contains XFA (XML Forms Architecture) content, which is known to be a vector for exploits. Heuristics indicate the presence of heap spray and exploit code targeting CVE-2010-0188, a vulnerability in Adobe Reader's LibTIFF handling. The embedded script payload and XFA form script further confirm the malicious intent to execute arbitrary code upon opening the document. The ClamAV detection also confirms its malicious nature.

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
f353b8bbafd4067d16d27b176b690c6308b4357c55892a13b67baad6700e7ff6		 pdf-embedded-script PDF raw stream script payload at offset 0x23B 113053 bytes

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