Malicious PDF — malware analysis report

Static analysis result for SHA-256 e436bd0bc4b45df5…

MALICIOUS

PDF

90.0 KB
MD5: 15633d3a1c86e0606451ff13e3d1ed8a SHA-1: 3d5351959f201f80151de4d6721e539ad77fdeee SHA-256: e436bd0bc4b45df570fe53df9a54d47b57d5a5aca718e93efcd2337f0695dc49
248 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is a PDF file that leverages XFA (XML Forms Architecture) to exploit CVE-2010-0188, a vulnerability in Adobe Reader's LibTIFF component. The XFA form contains JavaScript that performs a heap spray, indicating an attempt to execute arbitrary code. The embedded script payload and XFA heap spray heuristics confirm the exploit's nature. The embedded URLs are related to XFA schema definitions and do not appear to be malicious.

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_0000023c.bin
cffa20e4d44eff42b68e1ebc544731c43e62e16445e811deaa0ae717feb1bc56		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 91496 bytes

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