The official Hindi dubbing for Justice League was handled by professional artists (typically released on Blu-ray and TV channels like Sony MAX). However, because the movie is no longer a "new release" on streaming giants, users turn to illegal archives.
There are two versions of this movie. The 2017 theatrical cut (Joss Whedon) and the 2021 Zack Snyder's Justice League (4 hours long). Many fake links on Filmyzilla advertise the "2017 Hindi Dubbed" version but actually give you a low-quality, cam-recorded version of the 2021 cut with no audio sync. Justice League 2017 Hindi Dubbed Filmyzilla