MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains embedded JavaScript and multiple external URIs, including a link farm hosted on compromised WordPress sites and disposable domains, suggesting an attempt to trick users into downloading a malicious payload disguised as a PDF viewer. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation for client execution.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
Heuristics 7
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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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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://smidgel.ru/uplcv?utm_term=pdf+viewer+download+pc
- http://casadiriposomarsala.it/userfiles/files/12645897785.pdf
- http://unibeauty.com.br/ckfinder/userfiles/files/buzuwarufobelagukidug.pdf
- http://gok-maciejowice.pl/js/ckfinder/userfiles/files/73568739789.pdf
- https://ewastexperts.com/userfiles/files/bumewoginujafadilowe.pdf
- http://koreaticketland.com/userfile/file/73635469939.pdf
- http://fuhua.tumujike.com/assets/upload/files/202109080125239820.pdf
- http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16143aee70e319---zoximebedulisofatubo.pdf
- https://ww150002.linebot.net/upfile/files/20210903183445.pdf
- https://darshanam.com/ckfinder/userfiles/files/tiwepafezimufedorani.pdf
- http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/28091971996.pdf
- http://iucecb.com/files/file/pofug.pdf
- http://mizuho-co.net/file/ck/files/85781519169.pdf
- http://dar-tom.pl/userfiles/file/75540710580.pdf
- http://henskeschildersbedrijf.nl/upload/97498991758.pdf
- https://diphong.com/uploads/mefexejefizegitunukubotom.pdf
- http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/1128053911.pdf
- http://www.heatandgas.com/EditorImages/file/zikoxonav.pdf
- http://www.seminariomenorvalencia.com/admin/lib/ckfinder/userfiles/files/tekajasebigitekukisono.pdf
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161454981c0dc7---rivajer.pdf
- http://star-transform-moscow.ru/uimg/files/78040288525.pdf
- http://aescantabria.es/upload/fckeditor/file///numum.pdf
- http://musicincw.com/fckeditor/userfiles/image/76094899561.pdf
- http://swhos.com/upload/files/31372633613.pdf
- https://too.kg/wp-content/plugins/super-forms/uploads/php/files/51e638d8f68e6abbc26831124fe9f49d/26566471263.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_off0000be80.bin1ce1ae8328cca992ff37c22ba07ae4defa05f5a2f7a3dcd0730aee61a109d574 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBE80 | 16284 bytes |
font_01_sfnt_off0000e835.bin933151b92ae0abe361c30a703a4fc121e10cbd5d1caf399ef24dedf8d4699aff |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE835 | 10500 bytes |
font_02_sfnt_off0001003b.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1003B | 16792 bytes |
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