Much of the biographical information on the page coincides with that of Elisa Baker, from the user's age of 42, her husband's name Adam, as well as photos of her husband and Zahra.
The last time the user logged on was Oct. 8, the day before Zahra was reported missing. In the "Details" section of the page, the user wrote that she's a "proud parent." Under "Mood," she wrote "crazy."
Commenters have filled the pages with angry tirades against her.
Search warrants for the Bakers' two cars and home revealed the existence of the $1 million ransom note left on one of the family's two vehicles. The note, however, was not addressed to Zahra's parents but to her father's boss, Mark David Coffey.
"Mr. Coffey, you like being in control who is in control now we have your daughter and your pot smoking red head son is next unless you do what is asked 1,000,000 unmarked will be in touch soon [sic]," read handwriting on the note, according to the warrant.
"No cops" was also written twice on the note.
Coffey reportedly owns the property on which the Bakers live and was present the day Zahra was reported missing.
Police are looking into claims by a relative and former neighbors that Zahra was physically abused by her stepmother before she vanished.
Brittany Bentley, a relative of Zahra's, said Tuesday the girl "was beat almost every time I was over there for just the smallest things" by her stepmother.
"Elisa would get mad, she would take it out on Zahra, things the kid didn't deserve," Bentley said on CBS' "Early Show." "She just had a horrible home life."
Bentley, who is married to Elisa Baker's nephew, said Zahra was locked in her room most of the day and only allowed out for five minutes to eat.
"I just think this was something for a long time that we knew was going to happen, everybody that was close to the family," Bentley said, apparently referring to Zahra's disappearance.
Former neighbors in nearby Sawmills, N.C., also described Elisa Baker to ABC News as a stern and cold parent to Zahra.
"Just the way she yelled and screamed at her, and I did see her hit the child a couple of times," one former neighbor, Renee Bobbitt, told ABC News. Bobbitt also claimed Zahra was once sent to school with black eyes.
"I should have called and said something then," Bobbitt added. "I wish I had've a million times, because no child deserves anything like this. And it's really got the whole neighborhood upset because we all loved the child."
Investigators seized several items from the Baker home, including two gas cans, burn samples from the morning fire and drug paraphernalia, the warrant states. Two samples of "possible blood" were taken from one of the cars, according to a warrant.
Zahra's father, Adam Baker, told "Good Morning America" Monday that the girl's stepmother may have been involved in the girl's disappearance.
When asked if he believed his wife was involved in Zahra's disappearance, Baker said, "I wouldn't like to think so. It's kind of what I've heard so far. It could be possible."
Police have said that no one, including Elisa or Adam Baker, has been ruled out as a person of interest in the case.
Zahra had attended a local elementary school for fourth grade, but did not report to school this year. Instead, the school received a call and was told the child would be home-schooled, a Caldwell School District official told ABC News Monday.