MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised CMS upload directories. These links likely serve as a link farm to redirect users to malicious content, as indicated by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9934
Heuristics 7
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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 http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613c294a00302---remixulotu.pdf
- https://epgeptech.hu/ckfinder/userfiles/files/jodomonifadijaruwovoli.pdf
- http://celyroknaterase.sk/editor_uploads/system/files/zukagotetevomidigelalot.pdf
- https://www.gpaci.org.br/cms/ckfinder/userfiles/files/81780002425.pdf
- http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161375a1ae40cd---vogofiporifiduj.pdf
- https://spcinternational.in/ckfinder/userfiles/files/gejikojurewetiniti.pdf
- http://dglytbt.com/upfolder/e/files/20210907213209.pdf
- http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/24932862267.pdf
- http://chickendaylacrescenta.com/uploads/files/2364816007.pdf
- http://kondicionery-shodnya.ru/upload_picture/file/wopogo.pdf
- https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/wugupiv.pdf
- https://giltmorestukko.hu/ckfinder/userfiles/files/rorufowomeloganug.pdf
- http://acpiindia.com/userfiles/file/55371568784.pdf
- http://sugarfree-gelato.com/upload/file/dibuba.pdf
- https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/uddm8j5mre4u4ds95k3jdim4v5/tarunapezamodijigarekeka.pdf
- http://blueyee.com/upload/file/061819476231.pdf
- http://hyundaidongdo3s.com/images/files/23905980630.pdf
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c922c0183---88294396195.pdf
- http://paintmaster.hu/js/ckfinder/userfiles/files/buboxevukibuvifakuburosut.pdf
- https://thietbixanh.net/uploads/files/91450089742.pdf
- http://www.kymkarajok.net/tiedostot/files/negimodugufakitebasoniz.pdf
- http://pensjonatagat.pl/userfiles/file/fuzuzaf.pdf
- http://petrduchek.com/files/raxidifagiwokowavikosewe.pdf
- https://jokerprod.net/userfiles/file/57415955659.pdf
- http://allier-genealogie.org/File:/30986672751.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=noon+academy+app+apk
- 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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000d641.bin1c024217ce21bb66922f73502146d3c7616b47413e2e194c36dd680b30e64e78 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD641 | 16148 bytes |
font_01_sfnt_off0000ebcd.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEBCD | 16792 bytes |
font_02_sfnt_off000103e4.bin7bff1331461cb74fce3c498e556bf50315aec1e49437ba062d955274c2089cd3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x103E4 | 10352 bytes |
font_03_sfnt_off00011b46.bin0b51ebff29ad85eb7e61adf611c35744994faaba0f91eeac4d840c603e6dcc7b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11B46 | 22740 bytes |
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