Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a7d62956c10f20…

MALICIOUS

PDF

79.7 KB
MD5: 4c8efe945cb528603d2652b7f6da63fc SHA-1: 9bf79c4082da6b0b28152612ad92cbebc1711127 SHA-256: 93a7d62956c10f20060d6834e2415ec2b6fc5643f6c556d1a78e9e4cc5b1a5ae
188 Risk Score

Malware Insights

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

The sample is a PDF file that leverages XFA forms, triggering critical heuristics for CVE-2010-0188, an Adobe Reader LibTIFF exploit. An embedded script payload was also detected within the PDF stream. This indicates the file is designed to exploit vulnerabilities in PDF readers to execute arbitrary code, likely leading to the download and execution of a second-stage payload. The embedded URLs are related to XFA specifications and do not appear to be malicious themselves.

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_00000288.bin
d358016af4f0b32d882b49d686a73774910edce9b7a5ab76b93bf424c332836c		 pdf-embedded-script PDF raw stream script payload at offset 0x288 80933 bytes

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