Malicious PDF — malware analysis report

Static analysis result for SHA-256 d50d05a13f12156f…

MALICIOUS

PDF

111.3 KB
MD5: a0d92e9655e326f17a9120be24e0f897 SHA-1: 7d09b06c7b6d16a9cc701c5d835eebbaa529a063 SHA-256: d50d05a13f12156fc0e526043bd7c7a9d1bfbf46da642283e5a9c06afd4af9ad
248 Risk Score

Malware Insights

The file is a PDF document that leverages the CVE-2010-0188 vulnerability in Adobe Reader's XFA forms. This exploit is designed to execute an embedded script, as indicated by multiple critical heuristic firings and the presence of an embedded script artifact. The script is likely responsible for downloading and executing a second-stage payload. The ClamAV detection of 'Pdf.Exploit.Agent-6136306-0' further 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.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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_00000238.bin
6bc678c25d2513c5119dc98ce1953b4203c3a00da748782721bd298d0f7b18b7		 pdf-embedded-script PDF raw stream script payload at offset 0x238 113271 bytes
Detection
ClamAV: Js.Exploit.HTML-27
Obfuscation or payload: unlikely

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