MALICIOUS
134
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of a 'download button' heuristic and numerous embedded URLs, including one pointing to a potential exploit or malware download (`medvor.ru/uplcv`), strongly suggests a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristics indicate a malicious intent to trick the user into downloading further malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
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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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://medvor.ru/uplcv?utm_term=chrome+android+4.4+apk PDF link annotation
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145a34f6d562---welarerivipozivafofokaxim.pdfIn PDF document text
- https://mygrind.ie/userfiles/file/21944860247.pdfIn PDF document text
- http://ilksolar.com/Images/Media/files/nupalapufugolejipuzaz.pdfIn PDF document text
- http://niezapominajkowo.eu/userfiles/file/vufoju.pdfIn PDF document text
- http://gerastar.com/userfiles/file/xafolebigifowa.pdfIn PDF document text
- https://apatity.verlauf-ekb.ru/admin/ckfinder/userfiles/files/60673595600.pdfIn PDF document text
- http://pazarziraat.com/userfiles/file/pumajijumetadalozibirubov.pdfIn PDF document text
- https://weyergans-hcc.lv/userfiles/file/377985463.pdfIn PDF document text
- http://tprcindia.com/ckeditor/ckfinder/userfiles/files/sofunepesufazisijapober.pdfIn PDF document text
- http://anhuishangbiao.com/upload_fck/file/2021-9-11/20210911184708654653.pdfIn PDF document text
- https://kipass.fr/userfiles/file/81065279944.pdfIn PDF document text
- http://burragebrothers.org/demo/jolie/beta/userfiles/files/sinurekezarikosotojexuraw.pdfIn PDF document text
- https://censcakmu.org/board/file/files/65846944491.pdfIn PDF document text
- https://mapithanhcong.com/upload/ck/files/kanalafu.pdfIn PDF document text
- https://www.ewdel.cz/ckfinder/userfiles/files/baluduvosabatudukegad.pdfIn PDF document text
- http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613406533f028---vogetozis.pdfIn PDF document text
- https://gregoryshow.ru/files/file/84067290810.pdfIn PDF document text
- https://nycsmindia.org/ckfinder/userfiles/files/52412186366.pdfIn PDF document text
- https://global-product.org/CKEdit/upload/files/gubovebenutapa.pdfIn PDF document text
- http://travelci.ru/ckfinder/userfiles/files/73376679001.pdfIn PDF document text
- http://chickendaylacrescenta.com/uploads/files/divaxologovolijigijaresox.pdfIn PDF document text
- http://sanfrancescovet.com/userfiles/files/gixesa.pdfIn PDF document text
- http://adance0112.com/upfile/editor/file/51029996527.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_off0000d8e9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD8E9 | 17500 bytes |
SHA-256: 56f61e4f9576a486550d07758544707601749273348bbf9a0e72be4ce21acb50 |
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font_01_sfnt_off00010655.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10655 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00011e6c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11E6C | 10612 bytes |
SHA-256: 28c94a3f3360b4c41663bbf0ff7e4e736438f7d56dd88ca0766313b1c1011a55 |
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