Malicious PDF — malware analysis report

Static analysis result for SHA-256 523ab7916ac1a874…

MALICIOUS

PDF

111.0 KB
MD5: d52b806701b74e3efeb7de800b7c5aa5 SHA-1: 926208eaa8320aa29ca315ceb890dec5224418ea SHA-256: 523ab7916ac1a8745950ce981aab66a673d35cc583fcd94efc12aa6139532119
248 Risk Score

Malware Insights

The file is a PDF document that leverages the CVE-2010-0188 vulnerability in Adobe Reader. This exploit is designed to execute embedded scripts, as indicated by multiple heuristic firings related to XFA forms and embedded script payloads. The embedded script, detected by ClamAV as Js.Exploit.HTML-27, likely downloads and executes a second-stage payload. The overall attack pattern is consistent with a malicious document designed for initial compromise.

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
8d469c7c9a69b503511a074977bf7a98db7689417f35fe8a131993c6c7faf556		 pdf-embedded-script PDF raw stream script payload at offset 0x238 112897 bytes
Detection
ClamAV: Js.Exploit.HTML-27
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.