MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample contains embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. Several heuristics indicate the PDF is part of a link farm hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9978
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://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/buvthebum1vkthtfja0funhgo5/darufogezonunefazeda.pdf
- http://tahi.hu/ckfinder/userfiles/files/13486428754.pdf
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/75bb9bad82600f5d6662bb049d29e31e/nozaratibiveji.pdf
- http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/52d4596589b753e6d50ac923b3c52b8b/kozubowododibonu.pdf
- http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ab46025ef---15906640006.pdf
- https://oykufestivali.com/ckfinder/userfiles/files/46348203640.pdf
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bc452691f---73326409876.pdf
- https://soechi.net/userfiles/file/695561244.pdf
- http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ffe2d103d---67569194380.pdf
- https://autotrans911.com/thread/admin/uploads/file/tolopawaxat.pdf
- https://too.kg/wp-content/plugins/super-forms/uploads/php/files/e60a6a61201fe92c8c73d9269477e8a2/7784418958.pdf
- http://vncdata.net/app/webroot/uploads/files/54987569707.pdf
- https://www.sacict.or.th/ckfinder/userfiles/files/66819049378.pdf
- http://mastera-mix.ru/ckfinder/userfiles/files/60077237510.pdf
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a6e0dab48---41663402288.pdf
- http://wintec-samu.hu/uploads/files/bagajolajodebagabalijedu.pdf
- http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210605022154712513m536fo.pdf
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f92b79dfe7e---sanira.pdf
- http://blfimmobiliare.com/userfiles/files/vamuxamel.pdf
- https://preprodpcb.com/userfiles/files/zakuximolovamusibusak.pdf
- http://didula.com/img/file/suwawufumesejasod.pdf
- http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bb5d79767---837673044.pdf
- https://naveenent.com/administrator/imagetemp/file/sotajunivaxumuv.pdf
- http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/17233879274.pdf
- http://ankaser.com/userfiles/file/ropaxufoxixegokuxer.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=pisces+yearly+horoscope+2020
- 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_off0000dded.bin83ed39368196be75656b2d773077eef23242323226c85bdaf7efbe065cdf7e74 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDDED | 10628 bytes |
font_01_sfnt_off0000f666.bin1c5c2953311190ce10567ba570bc0f533574933ce0002bbb2c2e8102a9c16a9d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF666 | 17828 bytes |
font_02_sfnt_off000124fb.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x124FB | 16792 bytes |
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