MALICIOUS
134
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains or are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect the user to phishing or malware download sites. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.
Machine Learning
- Nyx PDF Classifier malicious score 0.9942
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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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 http://tdybio.com/uploadfile/file///2021100910042789.pdf In PDF document text
- https://tutorlookup.com/ckeditor/ckfinder/userfiles/files/79540936534.pdfIn PDF document text
- http://puebloexec.com/userfiles/file/4182039978.pdfIn PDF document text
- http://tuyothuyluc.vn/webroot/img/files/denomemulo.pdfIn PDF document text
- http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/bedonominovopefepokexi.pdfIn PDF document text
- http://bephoangdung.vn/uploads/ckfinder/files/xefemujawamamidikiwoje.pdfIn PDF document text
- http://tongrentangthai.com/UserFiles/file/61028559648.pdfIn PDF document text
- http://gutachterbewertung.de/userfiles/file/pipibuvase.pdfIn PDF document text
- http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffd2086b3f---58793106380.pdfIn PDF document text
- http://www.jacenter.org/js/ckfinder/userfiles/files/gegojibuduguzinozotimesow.pdfIn PDF document text
- http://sieuthivatlieuhoanthien.com/upload/files/powanezubizosomulege.pdfIn PDF document text
- https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/58732573058.pdfIn PDF document text
- https://fiscconsulting.com/userfiles/file/lutozaveg.pdfIn PDF document text
- https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614241e13a0f5---77687837592.pdfIn PDF document text
- https://barcelonamedicalcenter.com/files/galeria/files/larazirulovalev.pdfIn PDF document text
- http://stsmcc.org/www/js/ckfinder/userfiles/files/64091740579.pdfIn PDF document text
- http://onthebroadway.com/CPD/adminpanel/upload/file/dubexadefib.pdfIn PDF document text
- https://strechybenesov.cz/content/33732402042.pdfIn PDF document text
- http://kqcme.yiaiwang.com.cn/upload/files/25930583583.pdfIn PDF document text
- http://teplorium.su/userfiles/file/golasufoperigaxufipiwu.pdfIn PDF document text
- https://nothingbutsafetyglasses.com/userfiles/file/zegezevokoreloweguvi.pdfIn PDF document text
- http://glavis.biz/userfiles/file/90838069409.pdfIn PDF document text
- https://hujanuang.com/contents/files/bimunedafezutitaxela.pdfIn PDF document text
- https://mistral-paints.cz/userfiles/files/13872355777.pdfIn PDF document text
- https://loyallcanada.net/editor_files/file/lebokafuxakumivut.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=horse+amino+acid+sequence+in+cytochrome+cPDF link annotation
- 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_off0000e8fc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE8FC | 19984 bytes |
SHA-256: 3c77cecee25248136df051e3d42ffbb211b5dda87f2b3289ca98a9d5640732ef |
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font_01_sfnt_off00011cae.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11CAE | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off000134c5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x134C5 | 10940 bytes |
SHA-256: 18206c4d1f6495adae9b3eadcdd7581355513578b6ba4c88a0176a507a7dac1a |
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