手机剪切板里经常莫名其妙的出现神秘代码

比如这个，$pwt@902901c19@22940380t5$，

还有这个。
^quCYkpfnQq^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


这个。。。$pXlV1RDSUIw$ 。

这都是什么意思？为什么经常出现？手机格式化之后还是会出现，大神指点啊。