/usr/share/php/Aws/Sts/Exception/ is in php-aws-sdk 2.7.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Aws/Sts/Exception/ExpiredTokenException.php
/usr/share/php/Aws/Sts/Exception/IDPCommunicationErrorException.php
/usr/share/php/Aws/Sts/Exception/IDPRejectedClaimException.php
/usr/share/php/Aws/Sts/Exception/IncompleteSignatureException.php
/usr/share/php/Aws/Sts/Exception/InternalFailureException.php
/usr/share/php/Aws/Sts/Exception/InvalidActionException.php
/usr/share/php/Aws/Sts/Exception/InvalidAuthorizationMessageException.php
/usr/share/php/Aws/Sts/Exception/InvalidClientTokenIdException.php
/usr/share/php/Aws/Sts/Exception/InvalidIdentityTokenException.php
/usr/share/php/Aws/Sts/Exception/InvalidParameterCombinationException.php
/usr/share/php/Aws/Sts/Exception/InvalidParameterValueException.php
/usr/share/php/Aws/Sts/Exception/InvalidQueryParameterException.php
/usr/share/php/Aws/Sts/Exception/MalformedPolicyDocumentException.php
/usr/share/php/Aws/Sts/Exception/MalformedQueryStringException.php
/usr/share/php/Aws/Sts/Exception/MissingActionException.php
/usr/share/php/Aws/Sts/Exception/MissingAuthenticationTokenException.php
/usr/share/php/Aws/Sts/Exception/MissingParameterException.php
/usr/share/php/Aws/Sts/Exception/OptInRequiredException.php
/usr/share/php/Aws/Sts/Exception/PackedPolicyTooLargeException.php
/usr/share/php/Aws/Sts/Exception/RequestExpiredException.php
/usr/share/php/Aws/Sts/Exception/ServiceUnavailableException.php
/usr/share/php/Aws/Sts/Exception/StsException.php
/usr/share/php/Aws/Sts/Exception/ThrottlingException.php