Downloading standalone apps (APKs) from unverified sources to view WhatsApp DPs is a high-security risk. These apps often require extensive permissions—such as access to your contacts, storage, and even camera. Once installed, they may:

Several third-party platforms offer browser-based tools that only require a phone number in international format to retrieve a public DP:

If you want to ensure your own DP looks professional and is secure: Privacy Control : Navigate to Settings > Privacy > Profile Photo to choose who can see your image. Optimal Size

Meta is progressively locking down profile images: