# Adobe Shockwave — file signature 58 46 49 52 ?? ?? ?? ?? 4D 44 47 46 (little-endian) at offset 0

For Adobe Shockwave, hex signature is 58 46 49 52 ?? ?? ?? ?? 4D 44 47 46 (little-endian); offset is 0; extension is dcr, verified against its source on 2026-09-22.

- **Hex signature:** 58 46 49 52 ?? ?? ?? ?? 4D 44 47 46 (little-endian) _(verified: appears in the quote below)_
- **Offset:** 0 _(verified: appears in the quote below)_
- **Extension:** dcr _(verified: appears in the quote below)_
- **Format:** Adobe Shockwave _(verified: appears in the quote below)_

## What the source says

> 52 49 46 58 ?? ?? ?? ?? 46 47 44 4D (big-endian) | RIFX????FGDM | 0 | dcr | Adobe Shockwave [83] [84] [85] | 58 46 49 52 ?? ?? ?? ?? 4D 44 47 46 (little-endian) | XFIR????MDGF |

## Source

- https://en.wikipedia.org/wiki/List_of_file_signatures

Last verified: 2026-09-22. Review by: 2027-09-22.
Part of [File format magic numbers](https://referencesource.org/file-format-signatures/).