MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF document containing embedded JavaScript, which is a common technique for executing malicious code. The presence of numerous external links, many pointing to compromised WordPress sites, strongly suggests a phishing or redirection campaign. The ML classifier and ClamAV detection further support its malicious nature.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
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 http://cupta.org/userfiles/files/20210528154259.pdf
- https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/c3550018d11f483c8dbc56fb11311d7e/36756799131.pdf
- http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/zajuviteseve.pdf
- http://php-lounge.de/userfiles/file/wizopadavad.pdf
- https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/78bf8ce8b9f079cde236de321f0abbb7/39389469644.pdf
- http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a43512637---35549383353.pdf
- http://spearmanhsreunion.org/clients/e/e1/e1754705b4c076d7cd520c5e9e79ed07/File/vawerixupaputuwonomokoxom.pdf
- https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/d6de76bdecc6dc134a7049033a83e918/tigedunulexulojagenorekeg.pdf
- http://airelimpio.mx/img/editor/file/judodoruweduzegujude.pdf
- http://grapevinewinerytrail.com/clients/876125/File/tuluxugozinagodebi.pdf
- http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b05cab87190---42307638881.pdf
- http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beea9836545---25331062860.pdf
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/7970453ab21fe1df939c4401c30eeb51/nudigokejom.pdf
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085972421854---26725723200.pdf
- http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/kuluxunidozemov.pdf
- https://magyar-logyogyasz.hu/fileok/file/daperimuvomup.pdf
- https://coluer.ir/documents/file/52486687483.pdf
- http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/bf038a51fb0aa686ad709a9b6ac0c802/rutiwadabufe.pdf
- http://gabortech.comadmin/file/nelol.pdf
- http://kroonzuivel.nl/ckfinder/userfiles/files/12775038157.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=ejercicios+de+sumas+y+restas+con+la+ley+de+los+signos+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_off0000ee36.bin6d8c9ed906453a5105f32cc7b1fed7083276c52af4edd7b216c927c9edf42a19 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEE36 | 11288 bytes |
font_01_sfnt_off00010882.bin465624a305fbed4ae7858056bbd8f1817467cecd6c69ea6b57d9f0a8e72d89c9 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10882 | 18056 bytes |
font_02_sfnt_off0001369f.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1369F | 16792 bytes |
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