MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF document containing an embedded JavaScript stream and a large number of external URIs. The heuristics indicate that many of these URIs point to compromised CMS uploads and disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9917
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 https://nomylo.ru/uplcv?utm_term=thank+you+for+your+collaboration
- https://fizjolech.pl/userfiles/file/37360955109.pdf
- http://medicaldistri.com/ckfinder_files/files/77809892210.pdf
- http://aceonlinementors.com/userfiles/file/93354998614.pdf
- https://sasalidayanisma.org/uploads/file/42416275646.pdf
- http://sobinco.cz/ckfinder/userfiles/files/tevevizu.pdf
- http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/mkri31fme363h96aq932c2d0j7/86784831183.pdf
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/g8mfauel2s7aifrvsedaeuh725/16892370770.pdf
- http://thucphamchucnangmy.vn/uploads/files/xowujatuva.pdf
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/6cn0l6r0vmsrs28kb7uhqafbj1/puxemobi.pdf
- https://kisikana.hr/userfiles/file/suwexeruvipawopifasifi.pdf
- https://codecs.ro/images/file/86112292175.pdf
- http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/fj1vj34eq7329tmh1km7nau2ph/52974261025.pdf
- http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/d11711023f2d59bbf025b3301bd776d5/85652873015.pdf
- http://nguyenquangcomputer.com/upload/ck/files/44648837625.pdf
- http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16105c2835a43f---kugawetojosoxepubodonat.pdf
- https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/kfj6bcvj6a2u1o3m97qambios8/97646705688.pdf
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f1d4ed81d---bekuz.pdf
- http://kartywspomnien.pl/uploads/assets/file/guletika.pdf
- http://rc-modeller.se/images/file///6613218136.pdf
- https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/428820cd32d12f24399a745c6b0e3a62/50140962538.pdf
- http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/87951811701.pdf
- http://holzbau-napetschnig.at/wunuwikodusu.pdf
- https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/9d740a3c46a959873a9399d4776b86cc/fogujobur.pdf
- http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/58408923590.pdf
- http://4grd.com/cmsimages/file/dapukurodatopaw.pdf
- http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c34dbace963---binonopudepubep.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_off0000d822.binff0ecef08fc15fe18c10b2ab041136de8da5e43138a91743083ddd9e6e078781 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD822 | 17452 bytes |
font_01_sfnt_off00010489.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10489 | 16792 bytes |
font_02_sfnt_off00011ca0.bin3eeb3b2bdcf89ff0c2a58a2eb14685345ca629d97b6c252acfb57197bc907c64 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11CA0 | 10540 bytes |
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