MALICIOUS
134
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of hosting numerous links on disposable domains, suggesting an attempt to obscure the final malicious destination. While no scripts were explicitly extracted, the nature of the embedded URLs and the link farm heuristic strongly suggest a phishing or malware distribution attempt.
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://coretry.ru/uplcv?utm_term=aha+app+premium+mod+apk PDF link annotation
- http://daimarconstrucciones.com/images/admin/file/fuxewuji.pdfIn PDF document text
- http://k2plusinterior.com/userfiles/43225470610.pdfIn PDF document text
- http://koreanhotpot.com/uploads/files/bepakusawexefixubokab.pdfIn PDF document text
- http://snbedu.com/uploadfile/file///2021090500085160.pdfIn PDF document text
- http://naosgym.com/userfiles/files/79109432017.pdfIn PDF document text
- https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/76c9c9ab2f358161ce87cb446ac5dee9/domukofevefuvinitovogif.pdfIn PDF document text
- http://sromedical.com/file_media/file_image/file/70250237469.pdfIn PDF document text
- https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/98643805840.pdfIn PDF document text
- https://wtmasonry.com/ckfinder/userfiles/files/77136429952.pdfIn PDF document text
- http://obkladacstvikolar.com/content/zusujivixusiwafepifemilal.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b48724772---96416480522.pdfIn PDF document text
- https://pratham.one/file/nusekeduwuxo.pdfIn PDF document text
- https://etonbio.com/newsLetters/images/file/38048348564.pdfIn PDF document text
- http://www.gyndoktors.de/ckfinder/userfiles/files/lipom.pdfIn PDF document text
- http://zl369.net/userfiles/file/59799224591.pdfIn PDF document text
- http://consol.hu/images/uploadedimages/file/velirizesuzem.pdfIn PDF document text
- https://goldgreiner.de/userfiles/file/17183449105.pdfIn PDF document text
- http://kooijobs.in/ckfinder/userfiles/files/99319133084.pdfIn PDF document text
- https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/81131044907.pdfIn PDF document text
- https://albizy.com/ckfinder/userfiles/files/fumexufonagop.pdfIn PDF document text
- http://angerdress.store/ckfinder/userfiles/files/74380043502.pdfIn PDF document text
- https://viettrungson.com/media/Files/36071079017.pdfIn PDF document text
- http://hangquangauto.com/files/gumumozeralowatuxifevom.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_off0000d48c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD48C | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000eca3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xECA3 | 10416 bytes |
SHA-256: 28489a87ad7ad7b4fe01370bdb1f94f49fb2d65b72d562f9c0b52b1e8fdd80de |
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font_02_sfnt_off0001042f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1042F | 18240 bytes |
SHA-256: eb6d35662ac1bc8de88b81cc21452e2a6e0a8742be641ed4f59e2d2a6861a0fd |
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