It is false detection of malware. fix for this will be available in next release.
You can fix now by doing below changes.
replace below function in qa-include/qa-theme-base.php file with this code.
public function body_hidden()
$this->output('<div style="position:absolute;overflow:hidden;clip:rect(0 0 0 0);height:0;width:0;margin:0;padding:0;border:0;">');
or you can just download below zip and update q2a.
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Jan 12, 2019: Q2A 1.8.3 released!