Trojan on computer

Hello. Recently, when I installed the .apk file, the PC told me a threat was found. Threat: Trojan: Wacanac.b!ml
I have deleted it from my computer but I want to know why this occured.
AntiVirus: Microsoft Defender

If the app is yours, then the alert is a false positive. Also why would a PC antivirus flag an Android APK? It's a bit weird.