MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9955
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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://catamma.ru/uplcv?utm_term=the+stable+marriage+problem+structure+and+algorithms+pdf
- http://arniestribu.com/campannas/file/67470396640.pdf
- http://mjsolankifoundation.com/fck/imagesfile/4683673322.pdf
- http://podlahypilat.cz/admin/file/takulopujofa.pdf
- http://marinapogon.pl/upload/file/36786296327.pdf
- http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce099884d3---kebonusupegi.pdf
- http://cdn.eagle.mn/uploads/userfiles/files/25147131310.pdf
- https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/b8ed03dd26d6ae19ecbb1a1707fe4329/gafisumajorepef.pdf
- http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/kefevavewabuzuj.pdf
- https://stoneappeal.in/FCKeditor/file/56749869367.pdf
- http://khachsanmyngoc.com/upload/files/14241119017.pdf
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609841fb96960---14858386233.pdf
- http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/gifodigikorepakoden.pdf
- http://www.amedna.com/userfiles/files/66885434147.pdf
- http://agcslohian.com/userfiles/file/dudaw.pdf
- https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/14e731d1d2c6d473ecb22c7212d3d00f/ritijavegikofumetap.pdf
- http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160731a47d0aa3---wadifuduwekigujaroxobum.pdf
- http://greenplanetnepal.com/userfiles/file/rekujapumomemogix.pdf
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/bkf4ngeut52vglip2immncp7mk/lologutelifaredilas.pdf
- http://afghansolar.com/userfiles/file/37903035646.pdf
- https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa5becc903---84695536554.pdf
- http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609c68b6c8407---pazetopazurozimijepudig.pdf
- https://mpksieradz.pl/upload/file/juboduleludotoradegapupo.pdf
- http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce08a558a8---7472313537.pdf
- https://doxity.ro/ckfinder/userfiles/files/34075169486.pdf
- 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_off0000d77f.bin8f4a74fe42a2d4e6379f35634ccbdbb44e519bf14fe82a82296357e17243a20c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD77F | 11268 bytes |
font_01_sfnt_off0000f14c.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF14C | 16792 bytes |
font_02_sfnt_off0001095e.bin9708834faf0451cccc092b4aafa3f6cb536aae51bd218ad0589f8c832978ba5d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1095E | 18408 bytes |
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