MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains numerous external URIs and link farms, many pointing to compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or delivering a secondary payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9968
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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=hyaline+membrane+disease+pdf+2015 PDF link annotation
- http://guides2alpes.org/uploads/file/vimajaxomogikumime.pdfIn PDF document text
- http://werkschoenenverkoop.nl/images/docman/files/reror.pdfIn PDF document text
- https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/takuvopit.pdfIn PDF document text
- http://kaies.net/upfiles/210903132340519115uai3lw.pdfIn PDF document text
- http://domadoma.cz/userfiles/file/72129102332.pdfIn PDF document text
- https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/dbb366db7ab7dc523955d105f68f6a8e/rivexesamazewejat.pdfIn PDF document text
- http://www.gyndoktors.de/ckfinder/userfiles/files/29745008590.pdfIn PDF document text
- http://appli-veolia.net/ckfinder/userfiles/files/92234042841.pdfIn PDF document text
- https://rubyyadav.com/nbloom/fckuploads/file/17704980668.pdfIn PDF document text
- https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/b1go1ilq53c2j2eph3vlti42j1/liwas.pdfIn PDF document text
- https://adikkedua.com/contents/files/welipewubawabakofebi.pdfIn PDF document text
- http://skncn.com/u/files/rijopaxuk.pdfIn PDF document text
- http://soleilboo.com/images/uploads/files/77729105767.pdfIn PDF document text
- https://otterdisplay.com/userfiles/file/58182431160.pdfIn PDF document text
- http://www.sctiec.com/up_files/FCK/file/10740801845.pdfIn PDF document text
- https://barrier.exma.cl/ckfinder/userfiles/files/13892457339.pdfIn PDF document text
- http://abwclayton.com/uploads/files/pezuvubupepumanok.pdfIn PDF document text
- http://hopkim.vn/upload/files/14137806134.pdfIn PDF document text
- https://alarouba.com/ckfinder/userfiles/files/rijebesolujap.pdfIn PDF document text
- http://serdceprirody.ru/userfiles/file/zakobe.pdfIn PDF document text
- http://wx-bm.cn/upload/ckimg/files/202109020550094583.pdfIn PDF document text
- https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/d4a29af2d6e89a74a09f7aaa99a390aa/sezasowowomewet.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_off0000d3a1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD3A1 | 18244 bytes |
SHA-256: 6cbdb897df709dd73c9e00943bd147904e98dc8515e424b7ffe7300aba0bb7cf |
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font_01_sfnt_off000102d0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x102D0 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00011ae7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11AE7 | 11116 bytes |
SHA-256: 943df3e37f2573670fe43af9fcf8f3683392e72ecae6d1515cea37dc906fcb35 |
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