Malicious PDF — malware analysis report

Static analysis result for SHA-256 caef50af8e0f96e1…

MALICIOUS

PDF

111.3 KB
MD5: 541fc73e8eb83f66589a1ddc1f34976e SHA-1: 65bcaf88b4a31f6941163622afbe170a0ba39123 SHA-256: caef50af8e0f96e1aae7a94683708673265f498df7c14edc6bcf7fbb8212cd66
248 Risk Score

Malware Insights

This PDF file exploits CVE-2010-0188 via XFA forms to deliver a malicious payload. The embedded script, detected by ClamAV as 'Pdf.Exploit.Agent-6136306-0', is likely responsible for executing the exploit. An extracted artifact was also flagged by ClamAV as 'Js.Exploit.HTML-27', indicating JavaScript-based exploitation. The document body content is heavily obfuscated and does not provide clear user-facing text.

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
116df22aa39c0be6716dc048e8ea45d709f26c54d9599caf2eca67b7a92694a9		 pdf-embedded-script PDF raw stream script payload at offset 0x238 113273 bytes
Detection
ClamAV: Js.Exploit.HTML-27
Obfuscation or payload: unlikely

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