Detection Method: Exif analysis

Exif analysis looks at embedded metadata in files to uncover suspicious details that could indicate malicious activity. By extracting and analyzing Exif data from images, documents, PDFs, and other attachments, this method can help spot hidden threats that would normally go undetected.
Exif analysis can detect:
  • Document timestamps that don’t match the claimed origin
  • Authorship info that conflicts with the sender’s identity
  • Signs of image or document manipulation
  • Suspicious tools used to create the file
  • Geographical data that’s inconsistent with the expected origin
For example, a phishing email claiming to be an invoice might have metadata showing it was created with unauthorized tools, edited recently, or authored by someone outside the company it’s pretending to be from.
Rule Name & Severity
Last Updated
Author
Types, Tactics & Capabilities
Attachment: PDF with a suspicious string and single URL
4d ago
Oct 23rd, 2026
Sublime Security
Attachment: Re-stamped invoice PDF with IRS references from external sender
11d ago
Oct 16th, 2026
Sublime Security
Attachment: Fictitious invoice using LinkedIn's address
18d ago
Oct 9th, 2026
Sublime Security
Attachment: Encrypted PDF with credential theft body
19d ago
Oct 8th, 2026
Sublime Security
Attachment: Excel file with hyperlinks to suspicious domains
21d ago
Oct 6th, 2026
Sublime Security
Attachment: PDF credential phishing via wkhtmltopdf/Qt with suspicious link
26d ago
Oct 1st, 2026
Sublime Security
Attachment: Callback phishing solicitation via pdf file
29d ago
Sep 28th, 2026
Sublime Security
Attachment: PDF with version-only producer and default metadata
1mo ago
Sep 25th, 2026
Sublime Security
Spam: Item giveaway spam template
1mo ago
Sep 23rd, 2026
Sublime Security
Attachment: Legal themed message or PDF with suspicious indicators
1mo ago
Sep 15th, 2026
Sublime Security
Attachment: Encrypted PDF with credential theft language in EML
1mo ago
Sep 4th, 2026
Sublime Security
Link: Credential harvesting with excess padding evasion
1mo ago
Aug 28th, 2026
Sublime Security
Attachment: Invoice and W-9 PDFs with suspicious creators
2mo ago
Aug 25th, 2026
Sublime Security
Attachment: PDF with suspicious HeadlessChrome metadata
2mo ago
Aug 24th, 2026
Sublime Security
Brand impersonation: Microsoft logo image linking to free file host
2mo ago
Aug 21st, 2026
Sublime Security
Attachment: Single-page PDF with S3-hosted HTML link
3mo ago
Jul 16th, 2026
Sublime Security
Attachment: Suspicious PDF created with headless browser
3mo ago
Jul 1st, 2026
Sublime Security
Attachment: PDF with localhost IP in EXIF title metadata
3mo ago
Jun 29th, 2026
Sublime Security
Attachment: JPEG with gd-jpeg creator and suspicious file name
4mo ago
Jun 12th, 2026
Sublime Security
Attachment: MS OOXML file created by Administrator with zero edit time
4mo ago
Jun 12th, 2026
Sublime Security