Because this DLL is a known mimic target:
Hydra5-x64.dll is a Dynamic Link Library (DLL) file that's part of the Hydra I/O driver, a software component developed by Electronic Arts (EA). The "x64" in the filename indicates that it's a 64-bit DLL file, designed to work with 64-bit versions of Windows operating systems. hydra5-x64.dll
hydra5-x64.dll is a 64-bit Windows DLL whose role depends on the software that provides it. Treat unknown instances cautiously: check location, signatures, and behavior; scan with reputable security tools; obtain replacements only from official sources; and follow standard Windows troubleshooting and forensic steps if problems arise. Because this DLL is a known mimic target: Hydra5-x64