suspected requests

I found these requests in my 404 error log and I am not sure if I should be worried? ??

URL requests with the word “suspected” at the end – see below!

/newsfeter.php.suspected
/Dwsonv.php.suspected
/sllolx.php.suspected
/wp-logout.php.suspected
/wp-content/plugins/background-image-cropper/content-post.php.suspected
/s.php.suspected
/Mhbgf.php.suspected
/404.php.suspected

This article also explains: https://www.inmotionhosting.com/support/news/archived/link-template-php-suspected

Many Thanks