Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27ba171b73d1b4e…

MALICIOUS

PDF

52.8 KB
MD5: 3c202361a7a1f21253df414ed3945c54 SHA-1: cbac9430019c624d04ad22d5417322d7f3f1fd5b SHA-256: c27ba171b73d1b4efcf78fe4a85e718d85e5f81baf44f45583a3c6ecf53cdb18
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains an embedded script payload and exploits CVE-2010-0188, a vulnerability in Adobe Reader's handling of XFA forms. This indicates the document is designed to execute malicious code upon opening. The embedded script and exploit work together to deliver a secondary payload, as suggested by the ClamAV detection 'Pdf.Exploit.Dropped-93'. No specific malware family could be confidently identified.

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-93 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-93
  • 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
3dda276bf80eb81bb85efe326247d460714babed498fe4d1480dadd5a78ff4f7		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 53350 bytes

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