MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous external links, including one pointing to a compromised WordPress upload directory, suggesting it's part of a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution lure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9993
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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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://fivetc.vn/uploads/files/69662212663.pdf
- http://nadiadsa.org/userfiles/file/mukavovavaw.pdf
- https://silga.ca/userfiles/file/resufofi.pdf
- https://sahodayabbsr.com/test/fckeditor/file/91854462823.pdf
- http://softtox.com/new/userfiles/file/wowuselutufimomiborok.pdf
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a2a779500dbb24265603845f9da18f1e/xigurewonaf.pdf
- https://toptenstudy.com/upload/files/BodyFile__611D5EDC9D6A7.pdf
- https://sieuthimaytinhcu.vn/upload/files/xorapubowagudu.pdf
- http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e133d4746---25395546134.pdf
- http://adaviestransportltd.com/userfiles/file/waxawovifip.pdf
- http://oshcongregation.com/userfiles/file/giwuweboriteralegasono.pdf
- http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/a3f51oaahcncmaggjed9imjk26/zuxogifiwidamuladesigoxi.pdf
- http://hiroi-es.info/yamituki-n/uploads/files/67878795826.pdf
- https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/985c63811a91148a881103e1f5d00237/potajeg.pdf
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1d3c4cf395---59591078911.pdf
- http://leasingtowers.com/ckfinder/userfiles/files/90518534884.pdf
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16073f09046b90---pevonodudip.pdf
- https://stmarys-perthamboy.com/upload/File/dudemevifeteganesadesux.pdf
- http://www.iciparis.ru/ckfinder/userfiles/files/97309146621.pdf
- https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/86c4a06054c5a1876e56d6efa0da82e6/15628559129.pdf
- https://adamant54.ru/userfiles/files/zowiworebi.pdf
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c239864c4b4---pubewopabemal.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=the+purloined+letter+short+summary
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000d64f.bin077f9dd0d98637e81e3e6630b5b1097d0cdaabd973d71bfb3fdf02e33e918b8a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD64F | 18432 bytes |
font_01_sfnt_off0001061f.binef1f8c50e12da68951eef2b7d2e951caa9692bf31595a3a11e5c638789d1060b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1061F | 10836 bytes |
font_02_sfnt_off00011eec.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11EEC | 16792 bytes |
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