MALICIOUS
60
Risk Score
Machine Learning
- Nyx PDF Classifier clean score 0.0226
Heuristics 1
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CoolType Type 1 Multiple-Master font overflow — CVE-2010-1797 (jailbreakme) critical CVE likely CVE_2010_1797PDF embeds a Type 1 (PostScript) font that carries Multiple Master Blend keys (BlendDesignPositions/BlendAxisTypes/BlendDesignMap) together with an over-long clear-text overflow filler (a giant repeated-token array, a 1 KB+ contiguous junk token, or a 'blatantly invalid' self-label). Multiple Master is a deprecated Type 1 sub-format whose Blend handling drives a stack buffer overflow in the FreeType / Adobe CoolType font parser — the static shape of the 2010 'jailbreakme' PDF font 0-day (CVE-2010-1797), the /FontFile (Type 1) counterpart to the CVE-2010-2883 SING exploit. The malicious bytes live inside a FlateDecoded /FontFile, so JS, heap-spray and raw-byte rules never see them; rendering one glyph in the font forces the vulnerable parse.
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_type1_off000003eb.bin |
pdf-font-stream | PDF embedded font (type1) at offset 0x3EB | 421640 bytes |
SHA-256: 2bd893e80f5fc32388b09b068c8d457893251b2dba2b115c4b07c9a77b46f92d |
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