Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b65c671b9c9bb83…

MALICIOUS

PDF

111.1 KB
MD5: 8c131c74e6882c4c825bc09f8cd4cf53 SHA-1: 50d598c455f4a0f30d7a1db7a52b62ac94761727 SHA-256: 4b65c671b9c9bb834c47b3f723fe85d33a4b145954b8059a52d4abfda4137b81
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 a heap spray and exploit code targeting CVE-2010-0188, a vulnerability in Adobe Reader's LibTIFF component. The embedded script payload and XFA form script further confirm the malicious intent to execute arbitrary code. The embedded URLs are related to XFA specifications and do not appear to be malicious themselves.

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
b285a7cf685a771c44e636e822ec4076ffd8bc4b5ea9a6ad21e5680d91ed4023		 pdf-embedded-script PDF raw stream script payload at offset 0x23B 113053 bytes

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