Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8c9fc88a525e98…

MALICIOUS

PDF

75.7 KB
MD5: 687bd0d21dd05ef7824a6ec230d709ea SHA-1: b2b4b09222364a76f31f8e9255bf7e7f49faa370 SHA-256: 7c8c9fc88a525e98f7d39bf807143e4b9f30fa00e440fbdb2f4b6401d6c90507
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains an XFA form that triggers the CVE-2010-0188 exploit, targeting Adobe Reader. The embedded script payload, detected by ClamAV as Pdf.Exploit.Agent-6136306-0, is indicative of a malicious dropper designed to execute further stages of an attack. The exploit targets a known vulnerability, suggesting a delivery mechanism aimed at users with unpatched Adobe Reader installations.

Heuristics 6

  • 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.
  • 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_00000286.bin
96cb678cb00f3dc279937bbe727060ef1cb316a50bc4c643902bc913910b00dd		 pdf-embedded-script PDF raw stream script payload at offset 0x286 76780 bytes

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