MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious destinations. The ML classifier strongly flagged this PDF as malicious, and the heuristic firings suggest it's part of a larger scheme involving compromised CMS uploads. No scripts were extracted, but the primary attack pattern is the distribution of malicious links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9947
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://irlanc.ru/uplcv?utm_term=narrowing+of+oesophagus PDF link annotation
- http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b10a97927b9---19868141983.pdfIn PDF document text
- https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/924416a82db6b1c2b3a1303a2b5b22d7/widoruluxa.pdfIn PDF document text
- http://aceonlinementors.com/userfiles/file/49131129894.pdfIn PDF document text
- https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/04ed7ca3997fceb5b05c151447843d01/luwesifupowibesefijabari.pdfIn PDF document text
- http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105140248044803.pdfIn PDF document text
- https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608058159b6c9---fefawexavuruzami.pdfIn PDF document text
- https://mnlex.it/file/tuvadup.pdfIn PDF document text
- http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e7a241bd2---78420273599.pdfIn PDF document text
- http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/5c09342365777d0b3a40f4f4f6fb3a9c/65127322339.pdfIn PDF document text
- http://stoewebdesign.no/userfiles/file/98558729914.pdfIn PDF document text
- http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9a30bd4f8---4546419942.pdfIn PDF document text
- http://www.toeterloeh44.de/files/jujotogo.pdfIn PDF document text
- https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/cfq1cjm6a2vlg2sehif13eime1/fogekemolajunugedaseberut.pdfIn PDF document text
- https://mayurherbal.com/userfiles/file/boduxuda.pdfIn PDF document text
- https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/6b5a89697f8921ec2982d40e674b1754/77441740066.pdfIn PDF document text
- http://93564497.com/userfiles/vozem.pdfIn PDF document text
- https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/e47ad0ec888bf070352ee9f6a6d41f2d/40278564795.pdfIn PDF document text
- http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607281c6e542e---nuvute.pdfIn PDF document text
- http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ddf229df214---83480323039.pdfIn PDF document text
- http://usaoxin.com/userfiles/2021-5/file/94260042450.pdfIn PDF document text
- http://smeclassof1987reunion.com/clients/37165/File/68405689165.pdfIn PDF document text
- http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d27b50aa9d0---fovufoso.pdfIn PDF document text
- https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/e7c91998abebe419686a04e480431906/xirow.pdfIn PDF document text
- http://wjvanderheidedienstverlening.nl/uploads/file/wegebasivikifurevotipomu.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_off0000f015.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF015 | 16520 bytes |
SHA-256: 3dcc5f3882205313ad9e354dde1f3228d7b862b0baad400fa1cf28f12eb6b5cc |
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font_01_sfnt_off00011b0f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11B0F | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00013326.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13326 | 10656 bytes |
SHA-256: 9eb86daf111a223247f5bb61cb8e168e15beec137f921e83a78d9b10418275d3 |
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