MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.
Machine Learning
- Nyx PDF Classifier malicious score 0.9970
Heuristics 7
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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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=coolie+no+1+123+mkv PDF link annotation
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613304f7669e3.pdfIn PDF document text
- https://vadihosting.com/calisma2/files/uploads/7695724341.pdfIn PDF document text
- https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/a1c41ed5401d92f80e24b8cda68ec350/jiwup.pdfIn PDF document text
- http://heathrowairporttaxi.website/userfiles/file/16329863795.pdfIn PDF document text
- http://blesk-stroy.ru/userfiles/files/perefuto.pdfIn PDF document text
- http://siciny.eu/userfiles/file/81310657076.pdfIn PDF document text
- http://gt-outillages.fr/ressource/site-image/files/95331959143.pdfIn PDF document text
- http://mopi.eu/ckfinder/userfiles/files/mabupezexomaruzaxubel.pdfIn PDF document text
- http://transportdiverse.com/uploads/files/ridasoxusabuw.pdfIn PDF document text
- http://tradeweb.es/userfiles/file/vomogikozefigiveto.pdfIn PDF document text
- http://le-lemniscus-incandescent.fr/ckeditor/upload/files/6821165838.pdfIn PDF document text
- https://cvssteelex.com/ckfinder/userfiles/files/7027955543.pdfIn PDF document text
- http://quatanggiabao.com/images/uploads/files/64519790945.pdfIn PDF document text
- http://vankouwenenmastop.nl/UserFiles/file/24916271601.pdfIn PDF document text
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133dff9472d2---89559394442.pdfIn PDF document text
- https://spheresignal.com/app/webroot/userfiles/files/nuvusamakijevevafutozime.pdfIn PDF document text
- http://mitcostruttori.it/userfiles/files/14434690393.pdfIn PDF document text
- http://romangruszecki.com/uploaded/file/48098799137.pdfIn PDF document text
- https://dalba.net/other_files/File/linoxovam.pdfIn PDF document text
- https://jjcfurnituremaker.com/userfiles/files/3104498385.pdfIn PDF document text
- https://bouveau-consulting.com/userfiles/file/93615318797.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_off0000ea08.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEA08 | 19328 bytes |
SHA-256: a4931dc63793e2d9b1999aae7597ed66ed2762e205f2b97e7233e6eba76407dc |
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font_01_sfnt_off00011c12.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11C12 | 10276 bytes |
SHA-256: da3b915051acfea6444734c70b0c576610569f9645b2994350ecc5de37d6e0a6 |
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font_02_sfnt_off00013341.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13341 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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