I'm sorry, but it is not legal to download the full version of Matilda or any other copyrighted material for free. The film is protected by copyright law, which means that it is illegal to reproduce or distribute the film without permission from the copyright holder. While there may be websites or services that claim to offer free downloads of Matilda or other copyrighted material, these are likely to be illegal and may be unsafe to use. Instead, if you want to watch Matilda, you should consider purchasing or renting the film through a legitimate online platform, such as Amazon, Google Play, or Netflix. These platforms offer a legal way to access the film and support the creators and rights holders of the content.