A common signature and file extension for many drawingprograms
application/octet-stream
Magic Bytes
Offset: 0
01 FF 02 04 03 02
The Micrografx Designer Drawing (DRW) is a legacy vector graphics format originally developed by Micrografx for early Windows-based illustration software. It was primarily used to create technical schematics, architectural blueprints, and vector illustrations before being superseded by modern design standards. While the DRW extension is shared by several CAD applications, this specific format is now obsolete and generally poses no security risk, though it requires conversion software for archival viewing or modern accessibility.
Validation Code
How to validate .drw files in Python
Python
def is_drw(file_path: str) -> bool:
"""Check if file is a valid DRW by magic bytes."""
signature = bytes([0x01, 0xFF, 0x02, 0x04, 0x03, 0x02])
with open(file_path, "rb") as f:
return f.read(6) == signatureHow to validate .drw files in Node.js
Node.js
function isDRW(buffer: Buffer): boolean {
const signature = Buffer.from([0x01, 0xFF, 0x02, 0x04, 0x03, 0x02]);
return buffer.subarray(0, 6).equals(signature);
}
Go
func IsDRW(data []byte) bool {
signature := []byte{0x01, 0xFF, 0x02, 0x04, 0x03, 0x02}
if len(data) < 6 {
return false
}
return bytes.Equal(data[:6], signature)
}API Endpoint
GET
/api/v1/drw
curl https://filesignature.org/api/v1/drw