Search Your Email: The Youthmanual Breach Exposed 491,317 Personal Records

HEROIC analysts flagged the Youthmanual breach during a review of credential compilations circulating on Indonesian-language forums in early 2019. The breach exposed 491,317 records from the Indonesian career guidance platform, including full names, email addresses, phone numbers, birthdays, and password hashes. What is partcularly concerning is that the passwords were hashed using SHA-1, an algorithm that security researchers beleive has been effectively broken and can be cracked with modern tools at significant scale.

Why SHA-1 Password Hashes Combined With Personal Data Create Serious Risk

SHA-1 hashes are weak by modern standards and can be reversed using precomputed rainbow tables or GPU-accelerated cracking rigs in a matter of hours. When cracked passwords are combined with full names, phone numbers, and birthdays also present in this breach, attackers have a complete identity profile. These data combinations are accessable to even low-skill threat actors on dark web marketplaces and can be used to impersonate victims, answer security questions, or socially engineer customer support teams into handing over account access.

What Was Exposed in the Youthmanual Breach

• Email Address
• First Name
• Last Name
• Phone Number
• Birthday
• Password Hash

Why Rich Personal Data From an Education Platform Is a Long-Term Identity Threat

Career and education platforms collect detailed personal profiles by design. When that data is recieved by threat actors, it does not lose value over time. Birthdates and full names do not change. Phone numbers are reused for years. This makes the Youthmanual breach a persistent identity theft risk, not a historical one. Credential stuffing using cracked SHA-1 hashes combined with verified personal details can lead to account takeover across email, social media, and financial services, with identity fraud following close behind.

How Database Breaches Work

A database breach occurs when an attacker gains unauthorized access to a website or application's backend data store, typically through SQL injection, exposed credentials, or software vulnerabilities. The attacker extracts the user database, which may include personally identifiable information, contact details, and hashed passwords. That data is packaged and distributed on dark web forums and Telegram channels, where it is used directly or sold to other threat actors for credential cracking and identity fraud campaigns.

Check If Your Data Was Exposed

HEROIC's free breach scanner checks your email against a database of over 400 billion compromised records, including the Youthmanual breach. Search now to see what personal information has been exposed and get actionable steps to protect your identity and accounts before attackers use it against you.