MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristic indicates a pattern of using compromised web infrastructure for hosting.
Machine Learning
- Nyx PDF Classifier malicious score 0.9964
Heuristics 6
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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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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=bicycle+training+program+over+50
- https://geniodelweb.com/file/12846808089.pdf
- http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/8m3vtfaoqunhfq39j5i7tev2kg/37392307389.pdf
- http://mazdooradda.com/userfiles/file/finawomufagavakutujin.pdf
- https://telewebmarketing.com/FCKeditor/file/mufipiwal.pdf
- http://malbreil.com/userfiles/file/mamibozuxiv.pdf
- http://dok-vo.ru/userfiles/file/dununepitozutu.pdf
- http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fe6568c54---68006966442.pdf
- https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/80dgp4s6l4tenf19v2ells92os/8336193075.pdf
- https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/71b413354d314ae97f7037f0cdc3e1e5/reloronorimir.pdf
- https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c798826f330---taxumemuzir.pdf
- http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da7c6e5ca92---kufunitisalagulasute.pdf
- http://hilltop1976.com/clients/24685/File/10835449920.pdf
- https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/cb889605a3e2c0b44125c8fa0e909ae3/ruxugepenubemud.pdf
- http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/fc56d542821293cc30e7f2269c05f363/nuzovalegefadup.pdf
- https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/6e852d55f0be7b128469fe409a813a18/1412699637.pdf
- http://box8websites.com/ckfinder/userfiles/files/fegopepavenadomelep.pdf
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160705d65a6605---70499188074.pdf
- https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/qns968tar3algop6m0d5gobp4r/88027883418.pdf
- http://albertopizzetti.it/userfiles/files/17986303669.pdf
- https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/36f2f201652916c7150a30a3902adcad/7547432212.pdf
- http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a394a4c064e---83486089230.pdf
- http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ebd6fe668oa0eujdj5ib8mcm5/mumojomowowidowaw.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_off0000e795.bin7e622cbba6e22a9f86187a2bb157f234179f123dbbe0903afae27cb7c24f111c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE795 | 11036 bytes |
font_01_sfnt_off00010154.bin6db9023de8a034858a8c3d72dd66d070e1c2879621a772f839bb7fedded1ec22 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10154 | 17424 bytes |
font_02_sfnt_off00012f3c.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12F3C | 16792 bytes |
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