Malicious PDF — malware analysis report

Static analysis result for SHA-256 90aad4c50ff943be…

MALICIOUS

PDF

16.3 KB
MD5: c5f8cda0e2a632a149a0246fa158ffe2 SHA-1: 5bae5f83bdebc6bd380efe374ff1da7150453ab4 SHA-256: 90aad4c50ff943beec21cce4558a2cdb53f6d08b3f232f94c2d1dfbad5cebd25
188 Risk Score

Malware Insights

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

The sample is a PDF file that leverages the CVE-2010-0188 exploit targeting XFA forms and LibTIFF. Heuristics indicate an embedded script payload within an XFA form, strongly suggesting it's designed to execute malicious code upon opening in a vulnerable application. The embedded URL, while not directly malicious in reputation, is part of the XFA template structure.

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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000359.bin
dd9a4fd66c25e4563511c64ed1fd948159fdc884eeeebeb96ec8744855c8cbc9		 pdf-embedded-script PDF raw stream script payload at offset 0x359 15917 bytes

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