PDF malware analysis — malicious · d662d6ec082b37e0

MALICIOUS

PDF

115.7 KB Created: 2022-07-10 05:21:20 Authoring application: Assurance With Deloitte Consulting Llp harman (via FPDF 1.82) First seen: 2022-07-15

MD5: 8e3d3b8136910f7bf89199fcb5e378f0 SHA-1: ad344704c2c3aa55a8384ce19be27d5f25e6cf8d SHA-256: d662d6ec082b37e0241dfc02648ee339de7370f1e4cf3c49f7acb1a00cc0f736

62 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded and invisible links designed to trick the user into downloading a payload. The primary malicious URL identified is http://judgesclinic.site/Assurance-With-Deloitte-Consulting-Llp/pdf/marathonts.com, which is repeatedly used in the lure. The document body itself is heavily obfuscated, but the heuristic firings clearly indicate a payload delivery mechanism via these links.

Machine Learning

Nyx PDF Classifier clean score 0.0014

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://judgesclinic.site/Assurance-With-Deloitte-Consulting-Llp/pdf/marathonts.com
- http://judgesclinic.site/Assurance-With-Deloitte-Consulting-Llp/doc/marathonts.com
- https://marathonts.com/wp-content/uploads/formidable/1/stratford-ontario-visitors-guide.pdf
- https://marathonts.com/wp-content/uploads/formidable/1/memorandum-of-understands.pdf
- https://marathonts.com/wp-content/uploads/formidable/1/do-indians-require-visa-for-singapore.pdf
- https://marathonts.com/wp-content/uploads/formidable/1/weber-spirit-grill-assembly-instructions.pdf
- https://marathonts.com/wp-content/uploads/formidable/1/minimum-tax-withholding-to-avoid-penalty.pdf
- https://marathonts.com/wp-content/uploads/formidable/1/dbmarket-price-in-spreadsheet.pdf
- https://marathonts.com/wp-content/uploads/formidable/1/boat-licence-tasmania-test.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_022_off0001c26f.bin` `43b13684882d332187dbe2691d5e4f64c33a98e381a4dc2316374ba1b923b47c`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1C26F	76950 bytes

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