MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of a link farm pointing to compromised CMS upload directories and disposable hosting further suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9960
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://krisoc.ru/uplcv?utm_term=nsmb+rom+hacks
- https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/j8v10hsu2jp26fo46dle4117p6/lupogitaz.pdf
- http://ncfc.com.tr/ckfinder/userfiles/files/larirojarimoragodol.pdf
- https://yoimart.com/upload/file/20210916214219.pdf
- http://antitumor.org/filespath/files/20210906051830.pdf
- http://www.plain-pied.com/editeur/ckfinder/userfiles/files/goravukimomenarol.pdf
- http://pusheng168.com/uploadfiles/20210912115758.pdf
- https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/p4u0mcf83v598891qfo1dk2pg9/57383654302.pdf
- https://ibextrail.com/editor-images/90520662571.pdf
- https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/161486635af18c---pofisemod.pdf
- http://papianiarch.it/userfiles/files/13360337658.pdf
- https://hglobaltourb2c.com/FileData/ckfinder/files/20210912_747B406FE5E3237B.pdf
- https://dongphuchuytai.com/upload/files/sulet.pdf
- http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/630419cd2b8bd1e5fe1f4da0d072b4d1/63070505322.pdf
- https://ustunbilgisayar.com/userfiles/files/malomegabefopiserob.pdf
- http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44545463281.pdf
- http://licausi.it/userfiles/files/zikiriwejarosuz.pdf
- http://tsradviseurs.nl/mailing/images/photo/file/82967898200.pdf
- http://aaas.handyfriendship.com/upload/files/fesizejajobewujokex.pdf
- http://qhzs88.com/admin/fckeditor_upfiles/file/2021091413071480554.pdf
- http://bualuang101.com/backoffice/upload/files/jawadajobuxubawe.pdf
- http://48bulls.com/js/upload/files/88082535947.pdf
- https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/87898253024.pdf
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613db85fcca0c---24033413970.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_off0000dd1f.bind7a264ea45b5f6209b3e648b9d0447725b3434c4cf18915947b02b57e4442c37 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDD1F | 18348 bytes |
font_01_sfnt_off00010d0e.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10D0E | 16792 bytes |
font_02_sfnt_off00012525.bin92a74e61089f2c2052722cb681d58e2813e4cf7def21a9294a073820ee03665f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12525 | 10232 bytes |
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