Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b1c36384083cb4…

MALICIOUS

PDF

93.6 KB
MD5: 26d754352c86b855ed06da3f81c3c2a4 SHA-1: 3f31801fd21d7385c8120f4206f42d061b243da8 SHA-256: a9b1c36384083cb43f6cb33e3745f4680968d0875ac3373649baeab6ec925c88
198 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File T1059 Command and Scripting Interpreter

The PDF file contains an embedded script and exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. This indicates the file is designed to deliver a malicious payload. The embedded script and exploit suggest the primary goal is to download and execute a secondary stage. The ClamAV detection 'Pdf.Exploit.Dropped-78' further supports this assessment.

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.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
5d50a9400a88d314f567a0343fa33cf8d0a1169914f8dc32df310211d3cb9a42		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 95143 bytes

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