MALICIOUS
174
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The heuristic 'PDF_RANDOM_URL_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a malicious intent to redirect users to potentially harmful content. The ML classifier and ClamAV detection further support the malicious classification.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
Heuristics 7
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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 to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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://cructi.ru/uplcv?utm_term=game+hack+program PDF link annotation
- http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/petofabaxakukunewiri.pdfIn PDF document text
- https://samsungdvmklima.com/upload/ckfinder/files/pifufajimaxo.pdfIn PDF document text
- https://khabul.mn/mmpa/userfiles/files/69524223783.pdfIn PDF document text
- https://nikoljski.com/ckfinder/userfiles/files/44013956722.pdfIn PDF document text
- https://n-vv.dk/userfiles/file/dubapuzakifosefizozumi.pdfIn PDF document text
- https://moveo-sport.pl/userfiles/file/kiwujofogujozo.pdfIn PDF document text
- http://elateridae.com/images/FCKeditor/file/mexapuwimunowafoguletilul.pdfIn PDF document text
- http://starinviter.com/ckimagefiles/gadurusalududisapow.pdfIn PDF document text
- http://0851gay.org/userfiles/202109file/2021091110455470554.pdfIn PDF document text
- https://ariaparvaz.com/basefile/ariaparvazcom/files/51913975426.pdfIn PDF document text
- https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1615338cee75f3---dugux.pdfIn PDF document text
- http://poexali.org/static/image/_u/system/files/33237912499.pdfIn PDF document text
- https://cantellodetersiviprofessionali.it/uploads/file/90046705709.pdfIn PDF document text
- https://meritumptt.pl/dokumenty/file/46103618721.pdfIn PDF document text
- https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/direvidoxupiwakojefeg.pdfIn PDF document text
- https://spirit-legend-enterprises.com/webroot/editor-uploads/files/vesedodezowa.pdfIn PDF document text
- https://cplastik.cz/data/cms/file/96115648392.pdfIn PDF document text
- http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614242fd7998d---94579735275.pdfIn PDF document text
- http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/781775759.pdfIn PDF document text
- https://www.stnedu.com/ckfinder/upload/files/66181638781.pdfIn PDF document text
- http://yokosohk.com/files/fckfiles/file/xelex.pdfIn PDF document text
- https://illustrations.noche.fr/images/files/4752489576.pdfIn PDF document text
- http://lsbwg.com/ckfinder/userfiles/files/20210919/1925085491.pdfIn PDF document text
- https://vinocastillo.hu/editor_up/96840275581.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_off0000b03f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB03F | 10444 bytes |
SHA-256: 2b42fd3c83650c9ee98033dd9d5c03680e65ef39d1f187488f7ceef7bd719a01 |
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font_01_sfnt_off0000c7ef.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC7EF | 16120 bytes |
SHA-256: b637c9231e5295e0f584e4f27a04d44ec20ede3ca10f343fe9b12e5da96f92ff |
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font_02_sfnt_off0000f11e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF11E | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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