MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file contains a link farm with numerous URLs pointing to various websites, many of which appear to be compromised CMS uploads. The ML classifier strongly indicates maliciousness, and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirms the presence of a link farm on disposable hosting. The primary purpose seems to be redirecting users to external sites, likely for phishing or malware distribution.
Machine Learning
- Nyx PDF Classifier malicious score 0.9912
Heuristics 5
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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://infrive.ru/uplcv?utm_term=bubble+shooter+game+online+play PDF link annotation
- http://aquaclub.hu/userfiles/file/64471675583.pdfIn PDF document text
- http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/161383cb2e436a---45061474988.pdfIn PDF document text
- https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/479d7b3e7946989b337e18d8f0c9851e/82568824264.pdfIn PDF document text
- http://newabel.com/ckfinder/userfiles/files/tipibive.pdfIn PDF document text
- http://sgrappresentanze.eu/userfiles/files/zufuxapivulozakolemap.pdfIn PDF document text
- https://rentcar888.com/uploads/files/202109091815237561.pdfIn PDF document text
- http://metamorfoza-krosno.pl/userfiles/file/1036243087.pdfIn PDF document text
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614358c4200b9---72992879695.pdfIn PDF document text
- http://china-zub.ru/userfiles/file/35188080830.pdfIn PDF document text
- http://hfnhsw.com/upload/files/vuvakubexaluza.pdfIn PDF document text
- https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/5dcc6c94caec1fab55375947e4b32650/matonitumorokarevudemeb.pdfIn PDF document text
- http://galeriejacqueselbaz.com/userfiles/file/66100121771.pdfIn PDF document text
- http://fsnmmaterials.com/UPFILE/userfiles/files/guwaxariwoboxosenevasa.pdfIn PDF document text
- http://kaymccarthy.com/immagini/file/27946731077.pdfIn PDF document text
- http://deeringbayrealestate.com/userfiles/files/65044406213.pdfIn PDF document text
- http://thietbiantoanttk.com/uploads/files/sixikafivemilekavidab.pdfIn PDF document text
- https://galedo.cz/www/data/cms_files/files/kosemokomavu.pdfIn PDF document text
- http://mirai-kankyo.com/userfiles/files/20196011771.pdfIn PDF document text
- http://inica.org/files/file///bivoterufulezi.pdfIn PDF document text
- https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bc3b342d8b---musoxuvofepos.pdfIn PDF document text
- http://vipforiraq.com/userfiles/files/88169252823.pdfIn PDF document text
- https://graveyards-fuj.ae/userfiles/files/4716027318.pdfIn PDF document text
- https://fresh-cherries.com/ckfinder/userfiles/files/92952011446.pdfIn PDF document text
- http://unseretochter.ch/images/file/zeforuwilo.pdfIn PDF document text
- https://gsc-tw.com/userfiles/file/69909034019.pdfIn PDF document text
- http://rococosofa.com/files/files/72617515597.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_off0000e75f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE75F | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000ff71.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFF71 | 18092 bytes |
SHA-256: 27b610fb9d2a31f21ce8cd376ee0832d94bf3d64bb4bb2b95036125cb8c4075c |
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font_02_sfnt_off00012ddf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12DDF | 11104 bytes |
SHA-256: 89559f9395854c9dc8aafda104215254049b70a0dbd163701d1b71d988cc03bf |
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