Cybersecurity researchers have repeatedly found that “Canon Service Tool V3400” executables from non‑official sources contain:
Specifically, the "V3400" version is part of a series of service tools (including V2000, V3600, and V5103) and is notable for supporting a wide range of older and mid-generation Canon PIXMA and i-SENSYS models. Canon Service Tool V3400 -v 3.4 0.0 Download- Extra Quality
While V3400 is versatile, it generally supports Canon printers manufactured roughly between 2010 and 2015. Some of the popular supported series include: Canon Service Tool V3400: Comprehensive Overview and Usage