.NDB File Extension

File used by ClamAV, an open source antivirus program; contains a signature for a malware program in the following format:
MalwareName:TargetType:Offset:HexSignature

NDB files are used to create custom signatures for recognizing viruses and other harmful programs. They extend the virus definitions in .CVD files.

An NDB file is a drawing created by Nevron Software MyDraw, an application for creating various diagrams and technical illustrations. It stores text, shapes, lines, and other objects arranged together on a free-form canvas. NDB files are typically used for saving flowcharts, family trees, process diagrams, organizational charts, mind maps, data flow diagrams, and other types of drawings.

You can open NDB files with Nevron Software MyDraw in Windows and macOS by selecting File → Open.