Malicious PDF — malware analysis report

Static analysis result for SHA-256 93635f1d3e10b344…

MALICIOUS

PDF

50.5 KB
MD5: 8a8102a63189aa55da8636da67b17912 SHA-1: e36aef8e1d666cdeb38b30c5dbcd2006d630a88e SHA-256: 93635f1d3e10b3446e86719f4f159adfd2213a475f64c552bf6a08c85328f0fb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The PDF file contains embedded XFA forms and scripts, triggering heuristics for PDF_XFA_SCRIPT and PDF_EMBEDDED_SCRIPT_PAYLOAD. The critical heuristic CVE_2010_0188 indicates exploitation of a known Adobe Reader vulnerability. The embedded file and script payload suggest the document is designed to deliver and execute a secondary exploit or malware. The ClamAV detection 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
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_file_obj0008.bin
9f181e7dd20a11dbdaf0348d629e2c4654c847825c1116015de42ee2cb1b7080		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 50973 bytes

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