Suspected malware on stock apps in a Mediatek mtk65* based phone
I am sorry but you totally misinterpret the scanner results.
In both cases one of 61 scanners has detected something - that looks more like a false-positive. Additionally the scanners that detected something are uncommon. Not one of the major virus scanners detects anything on the samples. Rescan it some days later and if nothing has changed the chance is very very high that the result is not correct.
Additionally one item is detected as &quot;PUA&quot; - not as virus. PUA is the abbreviation for  - Potentially Unwanted Application - usually software like advertising trackers falls into this category.
The other is a PUP - hence a &quot;Potentially Unwanted Program&quot; which effectively means the same as PUA.
Conclusion: You totally panicked because you don't understand how to interpret the VirusTotal results.