Detection rules › Sublime MQL
Attachment: Finance themed PDF with observed phishing template
Detects PDF attachments containing a specific rectangular coordinate pattern at position [249.75 560 407.25 599.75], which may indicate a templated or malicious document structure.
Threat classification
Sublime's own taxonomy (not MITRE ATT&CK).
| Category | Values |
|---|---|
| Attack types | Credential Phishing |
| Tactics and techniques | PDF, Evasion |
Event coverage
| Message attribute |
|---|
| attachments (collection) |
| type |
Rule body MQL
type.inbound
and any(filter(attachments, .file_type == "pdf"),
any(file.explode(.),
any(.scan.strings.strings,
strings.contains(., "/Rect [ 249.75 560 407.25 599.75 ]")
)
)
)
Detection logic
Scope: inbound message.
Detects PDF attachments containing a specific rectangular coordinate pattern at position [249.75 560 407.25 599.75], which may indicate a templated or malicious document structure.
- inbound message
any of
filter(attachments)where:any of
file.explode(.)where:any of
.scan.strings.stringswhere:- . contains '/Rect [ 249.75 560 407.25 599.75 ]'
Inspects: attachments[].file_type, type.inbound. Sensors: file.explode, strings.contains.
Indicators matched (2)
| Field | Match | Value |
|---|---|---|
attachments[].file_type | equals | pdf |
strings.contains | substring | /Rect [ 249.75 560 407.25 599.75 ] |