PDF malware analysis — malicious · ba73d1011e9b47bd

MALICIOUS

PDF

108.8 KB Created: 2022-07-10 00:46:40 Authoring application: Cdc Vaccine Recommendations For Children hamer (via FPDF 1.82) First seen: 2022-07-15

MD5: 94274ddd39c1f622f81c01580549f080 SHA-1: 732e2b97358464cef845e372f4c283aed978b04c SHA-256: ba73d1011e9b47bd49d5ebcb7c02dabe1e30216678bd707270e2691d86ccf02f

62 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains multiple invisible and repeated links designed to trick the user into downloading a payload. The primary malicious URL identified is http://kmodevolis.site/Cdc-Vaccine-Recommendations-For-Children/pdf/sarahcyrus.com. The document body text is heavily obfuscated, but the heuristic firings clearly indicate a payload delivery attempt.

Machine Learning

Nyx PDF Classifier clean score 0.0009

Heuristics 2

Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE

PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://kmodevolis.site/Cdc-Vaccine-Recommendations-For-Children/pdf/sarahcyrus.com
- http://kmodevolis.site/Cdc-Vaccine-Recommendations-For-Children/doc/sarahcyrus.com
- https://sarahcyrus.com/wp-content/uploads/formidable/5/apply-a-credit-against-invoice.pdf
- https://sarahcyrus.com/wp-content/uploads/formidable/5/does-car-insurance-check-credit-report.pdf
- https://sarahcyrus.com/wp-content/uploads/formidable/5/www-reference-com-science.pdf
- https://sarahcyrus.com/wp-content/uploads/formidable/5/i-never-used-to-notice-the-little-things.pdf
- https://sarahcyrus.com/wp-content/uploads/formidable/5/california-notary-ackno-egment.pdf
- https://sarahcyrus.com/wp-content/uploads/formidable/5/i-heart-radio-request.pdf
- https://sarahcyrus.com/wp-content/uploads/formidable/5/best-dermatologist-recommended-lotion.pdf
- https://sarahcyrus.com/wp-content/uploads/formidable/5/thomas-rhett-concert-schedule.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_017_off0001a785.bin` `43b13684882d332187dbe2691d5e4f64c33a98e381a4dc2316374ba1b923b47c`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1A785	76950 bytes

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