Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff79133af3171f10…

MALICIOUS

PDF

122.9 KB
MD5: 7b296d759875514e3247d663c3dd109b SHA-1: fbb043eccd5030902e158dc93f97ec35a3e7f763 SHA-256: ff79133af3171f10ecfcfc37389c89cae8bdeaf9f6cc03f56e6c01e6bf2b983f
88 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains an embedded script payload, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV detection as Pdf.Exploit.Dropped-78 further confirms its malicious nature. The embedded script is likely responsible for downloading and executing a second-stage payload, although its exact functionality is obscured by the XFA form structure. The presence of an embedded URL suggests a delivery mechanism for the payload.

Heuristics 4

  • 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.
  • 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_00000329.bin
77e5fb523c04d52d27a8fbdddb947e6b2097cd314a1fcca3a3db075dd1bfc189		 pdf-embedded-script PDF raw stream script payload at offset 0x329 125087 bytes

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