### Comment:
What are some common techniques used to hide malware in legitimate-looking files or documents?

### REPLY:
One common technique to hide malware in legitimate-looking files or documents is through the use of file format exploits. By leveraging vulnerabilities in file formats such as PDF or Microsoft Office documents, attackers can embed malicious code that will execute when the file is opened. Another method is to use steganography, where the malware is concealed within the pixels of an image or the audio data of a sound file.