MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many hosted on compromised WordPress sites, which likely serve as a link farm to direct users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of external URIs and the link farm heuristic strongly suggest a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9942
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://medvor.ru/uplcv?utm_term=java+in+a+nutshell+7th+edition+pdf
- http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2a5127ea3---77223416218.pdf
- http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/wikafupunopidudiwi.pdf
- https://calprin.com/ckfinder/userfiles/files/52196158224.pdf
- https://malashealthcare.com/userfiles/files/dimamabuzamos.pdf
- https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/tezeroropuz.pdf
- https://clic-essc.ch/ck/ckfinder/userfiles/files/29733974337.pdf
- https://samuelben-horin.com/userfiles/file/41531249315.pdf
- https://cristalparkhotel.com.ve/ckfinder/userfiles/files/6143120881.pdf
- https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/508e1348252d041d72cd23f193979e34/34239612635.pdf
- http://acunambalaj.com/adenoto/upload/files/27129644087.pdf
- https://minhgianggroup.vn/upload/files/lusexif.pdf
- http://weilandvloeren.nl/fckimages/2237427028.pdf
- https://conexusinternational.com/ckfinder/userfiles/file/tosarasakazanisanonope.pdf
- http://xn--80aer5aza.xn---42-5cdakyymnnb9ake1az.xn--p1ai/ckfinder/userfiles/files/palotugimafukomifobobid.pdf
- http://zdrowejaja.com/Upload/file/91530736679.pdf
- https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/22073672432.pdf
- https://millinerandassoc.com/files/file/rawujesegogojitol.pdf
- https://nsck-cykelmotion.dk/userfiles/file/mesewadapajukus.pdf
- http://jkbprivateiti.com/userfiles/file/jebejenopozunagubami.pdf
- https://ginecologmuresan.ro/ckfinder/userfiles/files/fotizozifotirivajuzi.pdf
- http://fanghsin.com/uploads/files/202109140059054575.pdf
- https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/k85k2shpu9h9evt76ehflud9h3/28817960869.pdf
- http://familiehollander.nl/images/uploadedimages/file/kixepatureganuzobixonipu.pdf
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1613dde988d2d7---22428087945.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_off0000fcdf.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFCDF | 16792 bytes |
font_01_sfnt_off000114f1.bin5ae2c95a261f83f599afff284714834671924eb47684904f89f38a2641bb5bc3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x114F1 | 18788 bytes |
font_02_sfnt_off000145a5.binb047837587eb22e7f7219679000328f393a8010e5b29d29c2c39ebdae9e12df3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x145A5 | 10704 bytes |
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