MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The presence of compromised CMS upload links further supports a malicious purpose, likely for phishing or distributing further payloads.
Machine Learning
- Nyx PDF Classifier malicious score 0.9912
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 http://hoya-system.com/uploads/files/202109100551117038.pdf In PDF document text
- http://serbanindustrialconstruct.ro/uploads/files/dapekudomisagonilexamip.pdfIn PDF document text
- http://vector-mebel.ru/uploads/files/42978928620.pdfIn PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/cde52b86e7b7288c8d10d271bee6c1d0/jesunonovusasazuradelus.pdfIn PDF document text
- https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/1bfd972a2816d8c87d078b53c2a24ef8/94983396106.pdfIn PDF document text
- http://razaviota.ir/basefile/razaviotair/files/51835576560.pdfIn PDF document text
- https://medius.sk/userfiles/file/87556590645.pdfIn PDF document text
- http://zeguvietnam.com/uploads/ckfinder/files/poxapadojes.pdfIn PDF document text
- https://kisikana.hr/userfiles/file/71654550614.pdfIn PDF document text
- https://vildmarksjagt.dk/userfiles/file/25416152108.pdfIn PDF document text
- https://highfieldhousehotel.net/nbloom/fckuploads/file/peserikano.pdfIn PDF document text
- https://songod.vn/uploads/image/files/wifivakikeluwojum.pdfIn PDF document text
- https://cowik.pl/upload/97292292968.pdfIn PDF document text
- http://seattlebestteriyaki.com/uploads/files/tezatoludomokeper.pdfIn PDF document text
- http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137aabb8f18a---jekoxuze.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/4b3ca36cc2bf0a8c47a09f8b291e9286/57568204839.pdfIn PDF document text
- http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/161402a240fcae---65708944808.pdfIn PDF document text
- http://www.horakgolf.cz/ckfinder/userfiles/files/9660093096.pdfIn PDF document text
- http://105chers.netsociality.com/upload/files/woweliviridukasuperubeje.pdfIn PDF document text
- https://blokhol.com/upload/files/fidevikidijuruze.pdfIn PDF document text
- http://kahasat.cz/data/file/97257742843.pdfIn PDF document text
- http://yushendesign.com/images_fck/file/1631539888.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161428032de49a---31608962773.pdfIn PDF document text
- http://phutungquanghieu.com/app/webroot/files/ckfinder/files/99144116570.pdfIn PDF document text
- http://silverk.ru/img/lib/file/69433454729.pdfIn PDF document text
- http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130536051338---potizufo.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=epub+pdf+freePDF 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_off0000ee92.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEE92 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off000106a4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x106A4 | 19144 bytes |
SHA-256: 1b1c91dd75cbeb3db2b66739cdf4b47eb677b519be42147c7c74354b6d5a7e16 |
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font_02_sfnt_off00013889.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13889 | 9924 bytes |
SHA-256: ad89526dbe6de95a3433784b5e6a8329496d538523b4e5bc2c98c82e5f7edb77 |
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