MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9973
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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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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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://chcial.ru/uplcv?utm_term=auxiliary+verbs+worksheet+doc PDF link annotation
- https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/d6t07rri19fvrtulr8b1l4r0b2/pifivuvulevifudo.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071467057b1f---gomuzowule.pdfIn PDF document text
- https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c15c41cfa---zekasemegebalu.pdfIn PDF document text
- https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/c1e9147ff9dfbbf19e00096da9726efa/waworalufaxirov.pdfIn PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095cc0b3e935---taxavoxedoduterevovatalu.pdfIn PDF document text
- https://shieldtech.cz/ckfinder/userfiles/files/38598562984.pdfIn PDF document text
- http://antifftech.com/uploadfile/file///2021050106584566.pdfIn PDF document text
- http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cce9e203a90---fodite.pdfIn PDF document text
- https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/rb9mj6sq8qn8f4dpl6irdopsu0/xanafipovupenolugubimi.pdfIn PDF document text
- http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/rslfql2bf80808n9u5l391f3c6/82313668505.pdfIn PDF document text
- http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160fd289e8f474---1473318007.pdfIn PDF document text
- http://mrukseo.pl/userfiles/file/34090403726.pdfIn PDF document text
- http://lovemyskindayspa.com/clients/d/d9/d99ed7cf7cbac978b7326c22a81d1608/File/lutuporixilurebos.pdfIn PDF document text
- https://getracemirates.com/userfiles/files/remuv.pdfIn PDF document text
- https://fallahi-sch.com/userfiles/file/zonigu.pdfIn PDF document text
- https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/pmqe80f74qtblpt9qvd12s4kms/68734453227.pdfIn PDF document text
- http://intproplaw.com/admin/uploads/file/71291837680.pdfIn PDF document text
- https://osikovo.eu/webroot/img/content/files/tekebitu.pdfIn PDF document text
- http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/sironidopupe.pdfIn PDF document text
- https://polytex.de/sites/default/files/divovabowi.pdfIn PDF document text
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a3b7d8d09---72970006979.pdfIn PDF document text
- http://christopherspubandgrille.com/userfiles/files/70333731229.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/89fea4310e8eef830c8e340bd4204908/barabemamotux.pdfIn PDF document text
- https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609838d1e0f25---28298072283.pdfIn PDF document text
- 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_off0000bfbc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBFBC | 11044 bytes |
SHA-256: 0800dea54dc67ea5926cdb2c36703467462b5f9d1fe1cc11f3e1c8b3db97ae78 |
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font_01_sfnt_off0000d9af.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD9AF | 16080 bytes |
SHA-256: f3bff9c6757ea34652758b6c0142e283ea2ba22a981473d2a9b8374d77edad55 |
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font_02_sfnt_off0001027d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1027D | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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