Malware (Malicious Software) is a generic term used to refer to various forms of hostile or intrusive software. This includes viruses, backdoors, rootkits, adware, spamware and many other type of unwanted software. This encyclopedia is focused on website malware only.
Depending how you look, website malware can be viewed and be categorized differently. For example, when visiting a site with a browser, you may see SPAM links and categorize the injection as an SEO Spam attack.
However, when looking at the source of the PHP file, you may only see an encoded eval() statement that loads the links from a separated URL.
On a top level, we categorize malware as:
- Malicious iframes
- Conditional redirections
- SEO Spam
Which on a more granular level, they break down into multiple sub categories: