MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file contains a large number of embedded URLs, many of which point to compromised CMS upload directories. These URLs are designed to lure users into downloading additional malicious PDF files, indicating a link farm attack pattern. The ML classifier strongly supports the malicious verdict.
Machine Learning
- Nyx PDF Classifier malicious score 0.9974
Heuristics 5
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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Embedded URL info EMBEDDED_URLOne 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 https://linhngapt.vn/upload/files/wituzotobobogolov.pdf In PDF document text
- https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/a430a603177ac0d1f5c2957c7f97b177/92647615887.pdfIn PDF document text
- http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff84491f7c---tigikededijotanipexoxajo.pdfIn PDF document text
- http://musicfriend.vn/public/default/ckeditor/files/towejexetutodazowitukewa.pdfIn PDF document text
- http://altaprecision.com/userfiles/file/46651799556.pdfIn PDF document text
- http://csc021.com/userfiles/file/20210912154712_sglvia.pdfIn PDF document text
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613dec2ec8da8---mesirifa.pdfIn PDF document text
- http://manegedebuitenwijck.nl/uploads/file/netadituxagexores.pdfIn PDF document text
- http://vitali-schulz-eiskunstlaufen.de/userfiles/files/19139506635.pdfIn PDF document text
- http://maychaybocaocap.com/app/webroot/uploads/files/zumexajuvetumom.pdfIn PDF document text
- http://ulleungroadtour.com/FileData/ckfinder/files/20210909_5AC1FC35391A07AD.pdfIn PDF document text
- https://colakcivi.com/userfiles/file/99575639582.pdfIn PDF document text
- https://cvsc.co/userfiles/file/1382117320.pdfIn PDF document text
- http://bkht.vn/userfiles/file/gapuvomuvapifebi.pdfIn PDF document text
- https://farmacieitaliane.com/documenti/file/38907793808.pdfIn PDF document text
- http://clipsttm.com/userfiles/file///582699468.pdfIn PDF document text
- https://unovosti.tv/ckfinder/userfiles/files/1520772126.pdfIn PDF document text
- http://hillsdalehorseboarding.com/ckfinder/userfiles/files/jemawotu.pdfIn PDF document text
- https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/6caf9b7bae914662f084687b488433f2/zatopareretoba.pdfIn PDF document text
- http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/xilazebagi.pdfIn PDF document text
- http://udmvdpo.ru/images/files/80123174842.pdfIn PDF document text
- http://xn--aknmedcal-wpbe.com/uploads/file/vidibexizajip.pdfIn PDF document text
- http://lnv-cnc.com/userfiles/file/79547003291.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=160by2+mod+apkPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000b982.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB982 | 10524 bytes |
SHA-256: 659ae32ea6bcaee0cef69f355a919ed8c5a2089afa181fd1b3fed61547a63948 |
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font_01_sfnt_off0000d151.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD151 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0000e963.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE963 | 16032 bytes |
SHA-256: f72538ef3495182bbbce3817462a8f54b428019db20f53dad8c0f04140f8eb18 |
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