Malicious PDF — malware analysis report

Static analysis result for SHA-256 273c37b48aa66b79…

MALICIOUS

PDF

79.3 KB
MD5: 4b1023595f07f6280d1482885c72ea6d SHA-1: 940339c4706d1dfcea9fd7c86837a5a7b4b2210d SHA-256: 273c37b48aa66b79df865849fca6e8736fb7420a15c713350b9eb61579b5bd3a
88 Risk Score

Malware Insights

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

The PDF file utilizes XFA forms, a known vector for exploitation. A critical ClamAV heuristic identified it as 'Pdf.Exploit.Agent-6136306-0', indicating a malicious exploit. An embedded script payload was also detected, likely responsible for executing the exploit and delivering a secondary payload. The embedded URLs, while not directly malicious, are associated with XFA form definitions.

Heuristics 4

  • 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_0000023c.bin
35fcfbe2078880a39703d79dd512ba0f2b0cda7f562820f55abd3515de3aeea7		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 80536 bytes

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