MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, many of which point to compromised WordPress sites or other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or SEO manipulation tactic.
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://wastran.ru/uplcv?utm_term=a+first+course+in+string+theory+zwiebach+pdf
- http://www.lebedosapartotel.com/data/yukle/files/27641967139.pdf
- https://driftwoodcc.com/userfiles/files/81943857439.pdf
- http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16071751b9df23---pimekup.pdf
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9313547f7b---24809760866.pdf
- https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160754e0a139be---16687620220.pdf
- https://grandplaza.bg/uploads/assets/file/97252931631.pdf
- https://acronimocostanzo.com/userfiles/file/fexurulada.pdf
- http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbae7f33fa---56123516831.pdf
- http://4seasonstours.in/userfiles/file/bajadex.pdf
- http://akkoryazilim.com/userfiles/file/ronafomuxere.pdf
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/601a1349ec6a78783afab47b83d86c2d/fesonexarogipaliduru.pdf
- https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c387260de---51386723072.pdf
- http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d5f4dce24e8---11412814417.pdf
- http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb6294b4fa---5389232239.pdf
- http://nuovartea.eu/userfiles/files/17581339636.pdf
- http://alumcity.ru/userfiles/file/dapimakubino.pdf
- http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9492c3561---kagatulosizasolafupan.pdf
- https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/8fec18bd4487de797209cc024c668333/jibumamur.pdf
- https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/a4e3e5b800693f7785a649f28a538e4b/1002031300.pdf
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/qfiqthuncb43rt43u73qhgfqo2/66138371622.pdf
- https://congchung7.com/upload/file/21980880904.pdf
- http://tunesistudio.eu/userfiles/files/52692481393.pdf
- http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0dcf3a6b8---wawiveminejula.pdf
- http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16093b17d17d80---jekuxulelez.pdf
- http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f8431886f---46994707876.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_off0000f1ea.binbbcec9e8ece2767789e1932078ffd76922a131bf48d63c8404b95be30bc469df |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF1EA | 11336 bytes |
font_01_sfnt_off00010c42.bine7c76c66a23ab43fba1749a20a5cb66735de1a4f48eea2e56f450e1196d22f2b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10C42 | 17512 bytes |
font_02_sfnt_off00013a05.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13A05 | 16792 bytes |
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