MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristic analysis revealed numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content, further supporting the link farm hypothesis.
Machine Learning
- Nyx PDF Classifier malicious score 0.9960
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://krisoc.ru/uplcv?utm_term=ms+powerpoint+apk+download PDF link annotation
- https://trinityautorepairs.com/uploads/files/juvejisiwawuxiwitabur.pdfIn PDF document text
- http://detskypohar.cz/upload/file/jadak.pdfIn PDF document text
- http://iamsong.vn/uploads/files/wadiketenupizofotokobu.pdfIn PDF document text
- http://denda.co.kr/ckfinder/userfiles/files/mivomefiwovubonosifap.pdfIn PDF document text
- http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7cba7b277---55820551007.pdfIn PDF document text
- http://www.hgbehringer.de/img/files/files/23077433250.pdfIn PDF document text
- http://slavutich-media.ru/userfiles/file/lujerogopumevaredafape.pdfIn PDF document text
- https://wroclawmodelshow.pl/ckfinder/userfiles/files/piximaxezoni.pdfIn PDF document text
- http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/30ac37a1ad2d163659bd324ce4412f42/bijezowuxadubegavuvem.pdfIn PDF document text
- http://hstechno.com/userData/ebizro_board/file/xowenidofaputumividuj.pdfIn PDF document text
- http://elverum-revmatiker.no/images/file/volubimed.pdfIn PDF document text
- http://www.polni.si/Images/files/55531516336.pdfIn PDF document text
- http://cravaluos.com/ckfinder/userfiles/files/domupaferifotedij.pdfIn PDF document text
- http://omonetach.pl/foto/ilustracje/file/toteduwo.pdfIn PDF document text
- http://wannawwannie.pl/userfiles/file/28610053989.pdfIn PDF document text
- http://jfac.kr/ckfinder/userfiles/files/bipesefa.pdfIn PDF document text
- http://timebymtm.com/upload/files/loserikojev.pdfIn PDF document text
- http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161308cc66a93c---26603381645.pdfIn PDF document text
- https://primer-spb.ru/files/files/vexixagesazonorolesod.pdfIn PDF document text
- http://bonsite.nl/phpcmsys/file/zewibixemoxakebijevud.pdfIn PDF document text
- https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/fikamips1q1sr285gloihjk193/rujiruxoluzaf.pdfIn PDF document text
- https://bodymart.in/ckfinder/userfiles/files/86064551598.pdfIn PDF document text
- http://vecsecity.info/editor_up/pesedujafexezego.pdfIn PDF document text
- 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_off0000d3af.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD3AF | 10556 bytes |
SHA-256: 91a980690beb9909ea3749cbc14a74d2f2fcdbc5f84f540750d59f98ae0fac65 |
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font_01_sfnt_off0000ebed.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEBED | 17880 bytes |
SHA-256: e52db79efcb65fa4f7e9d53aa01d96d292db2da2c2079f27e786f36772b050a3 |
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font_02_sfnt_off000119f1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x119F1 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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