MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.001 User Execution: Malicious Link
The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs and is identified as a link farm, likely designed to redirect users to malicious websites. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the final malicious destination.
Machine Learning
- Nyx PDF Classifier malicious score 0.9974
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://krisoc.ru/uplcv?utm_term=sight+word+worksheets+for+first+grade+free PDF link annotation
- http://vytvarnyobchod.cz/UserFiles/File/vaduwa.pdfIn PDF document text
- https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/49c920bce0435eb181f2bc50fcd10175/rexumozikusonobel.pdfIn PDF document text
- http://abwingssuffolk1.com/uploads/files/6240982547.pdfIn PDF document text
- https://radiosmile.hu/upload/file/98249679385.pdfIn PDF document text
- http://dietgame.net/admin/fckeditor/data/file/20210810232948.pdfIn PDF document text
- https://seedcambodia.org/htdocs/cljr/data/files/58759161545.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/kpt42cq6fia23onu73enlhkqh0/fevanubejegan.pdfIn PDF document text
- https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160859085d98da---kiresozis.pdfIn PDF document text
- http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/40788554758.pdfIn PDF document text
- https://castel.ro/userfiles/file/benuzutogajebogiwemuvija.pdfIn PDF document text
- http://almar-bus.pl/userfiles/file/34862258982.pdfIn PDF document text
- https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/4i0mmu38doos2npp83cgsafnk5/zokuwaje.pdfIn PDF document text
- https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/59c7bed4e224fbf2b6c574a3dbe9c083/safosa.pdfIn PDF document text
- http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/48f6997719d0461a19d1cf10e90d3744/nuliwaven.pdfIn PDF document text
- https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/31b4dbffa092650a2a0c281cbb3b16f5/62545970195.pdfIn PDF document text
- http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd475d43de---33885207539.pdfIn PDF document text
- https://ceccarbotosani.ro/userfiles/file/26458579761.pdfIn PDF document text
- http://famillespourstarlight.org/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/73460922480.pdfIn PDF document text
- https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/hrtrmmf00hi9ldc3q961f0el01/pevizubovezazipabuze.pdfIn PDF document text
- http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/58941738741.pdfIn PDF document text
- https://lenaoyunlar.com/calisma2/files/uploads/jinofirariliwor.pdfIn PDF document text
- http://splogservice.ru/content/file/17452912557.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/b1b969dcthef626gmgjqcvuoo1/ziduxokaxinesagaw.pdfIn PDF document text
- https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/22mn6ufgb6hlbrqjse6mcjia9t/95496979656.pdfIn PDF document text
- http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/161359f808ff26---38375025609.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_off0000e2dc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE2DC | 10736 bytes |
SHA-256: 72476f8f376d0f4aac38cf5adf3c295026a0a597bac54161edbb7af428398ecb |
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font_01_sfnt_off0000fb8f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFB8F | 17096 bytes |
SHA-256: 2bbf7831fee0cf86438ef6ea2f5af96b9bf3f3b4ec4b126b40b350707259f8ee |
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font_02_sfnt_off000127b7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x127B7 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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