Medini,
As I understand Philo with regards to 'Logos' ... he speaks in terms of a cosmic, metaphysical influence, rather than a physical, bodily (human) manifestation of any sort. In fact, I thought Philo (as influenced by Plato) was of the opinion that the body was a tomb or sepulchre of the soul.
I cannot imagine that his conceptualization of the LOGOS would ever have involved incarnation into a human body (place of decay/tomb).
Unless you can reference a source showing that Philo considered bodily (human) incarnation of the Logos a possibility, then your insistence that Hebrews / 1 Clement reflect Philo's ideas of LOGOS is unfounded.