MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicating a link farm strategy. The ML classifier strongly flagged this PDF as malicious, and heuristics identified it as a link farm designed to redirect users. The document body is heavily obfuscated and unreadable, providing no direct content-based clues.
Machine Learning
- Nyx PDF Classifier malicious score 0.9970
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://synerhu.ru/uplcv?utm_term=echocardiography+pdf+free PDF link annotation
- https://psychologgia.pl/Upload/file/sisavizeporeroviruj.pdfIn PDF document text
- http://bfr-bialapodlaska.pl/userfiles/file/bafenutirumusavunubesozo.pdfIn PDF document text
- http://tischlerei-schlusche.de/sites/default/files/file/degudoxir.pdfIn PDF document text
- http://classicalgardenfountains.com/uplds/file/vogetibofufetobama.pdfIn PDF document text
- http://kuresi-kaitori.com/upload/content_pic/files/5823386929.pdfIn PDF document text
- http://influences-vegetales.eu/assets/Image//files/ziwevo.pdfIn PDF document text
- http://cherryontop.pl/upload/fotki/file/mixaxazukenaxawegajil.pdfIn PDF document text
- http://mebell-city.ru/ckfinder/userfiles/files/42967922867.pdfIn PDF document text
- http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/zopinezafidosenibo.pdfIn PDF document text
- http://www.facyt.com.ar/ckfinder/userfiles/files/24707329549.pdfIn PDF document text
- https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2fd0937ac---sonuwikugibu.pdfIn PDF document text
- http://rungruangsteel.com/public/upload/userfiles/files/73517893563.pdfIn PDF document text
- http://burchiellati.com./file_fck/file/99097743622.pdfIn PDF document text
- https://mehreganimaging.ir/images/upload/files/regofuwemababiwupufe.pdfIn PDF document text
- http://www.frank-diagn.hu/userfiles/files/nogirorabe.pdfIn PDF document text
- http://oreade-breche.fr/userfiles/file/pirexifideb.pdfIn PDF document text
- http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/7gsi8m5fjdobqk9lv7knf2qcm7/fugusodibusijevesi.pdfIn PDF document text
- http://ipoz.pl/userfiles/file/xavuvutesamevixa.pdfIn PDF document text
- http://e-kva.ru/admin/ckfinder/userfiles/files/lizofojosopudapodej.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a7e0f10e6d---jatewabibobu.pdfIn PDF document text
- https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/1sv40nbk01sg1099ihpuf8cqj4/58944999472.pdfIn PDF document text
- http://www.yoko-ono.be/images/userfiles/file/gipuginidin.pdfIn PDF document text
- https://adepotcustom.com/UploadFiles/file/20210713040436188.pdfIn PDF document text
- https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753bda152f6---18584717752.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_off0000f95d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF95D | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off00011174.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11174 | 10580 bytes |
SHA-256: 4ccfd771a874c7da61a538f90d73f59988edc71d3f4c72c6244963b7df29667e |
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font_02_sfnt_off0001297f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1297F | 19820 bytes |
SHA-256: adacfefd232e3f41375ba939cc7fc0925d65bb85e8719e485ea40d0d859a91f3 |
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