MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains multiple links to external resources, with one heuristic specifically identifying a link to an algorithmically-generated URL. The presence of ClamAV detection and ML classification as malicious, along with the PDF_SEO_DISPOSABLE_LINK_FARM heuristic, strongly suggests a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the overall structure and heuristics point to a malicious intent to redirect users to potentially harmful content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9974
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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PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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://chcial.ru/uplcv?utm_term=download+windows+11+pro+64+bit+iso+2020 PDF link annotation
- https://office-agglo-larochelle.fr/userfiles/file/wotunitopugugobod.pdfIn PDF document text
- http://inoxbienhoa.com/upload/files/webisuxa.pdfIn PDF document text
- https://envida-nieuws.nl/bsb_website/upload_fck/file/toroladivasanufadix.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebafc7d920---torubaxozaladosivinabuv.pdfIn PDF document text
- http://amidoux-peintures.com/ckfinder/userfiles/files/kimavurobepijelubimire.pdfIn PDF document text
- http://erex.hu/upload/file/dejutijamuwusamira.pdfIn PDF document text
- https://hatinhjobs.com/upload/files/35181389069.pdfIn PDF document text
- http://rsport.eu/yonexshop/static/file/mobutiwodewuwitenumitima.pdfIn PDF document text
- http://infinity-c-t.com/userfiles/file/mekalumiguf.pdfIn PDF document text
- https://bcbc3399.com/upload/files/83195152908.pdfIn PDF document text
- http://songdolandmarkcity.com/userfiles/file/17464873552.pdfIn PDF document text
- http://sten.kr/club/data/userfiles/file/20210905044847.pdfIn PDF document text
- http://carraracucinecomponibilitrapani.it/userfiles/files/57209703212.pdfIn PDF document text
- http://pointerboards.com/uploads/admin/files/45776077927.pdfIn PDF document text
- https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/numuzerukul.pdfIn PDF document text
- http://landpas.pl/upload/file/24324178505.pdfIn PDF document text
- http://helenhotel.vn/upload/files/xomajosojatosajebitoxi.pdfIn PDF document text
- http://dmhu.eu/uploads/uplib/file/96842116922.pdfIn PDF document text
- https://asi-filter.pl/files/file/kedizupes.pdfIn PDF document text
- http://tatagz.com/uploadfile/files/21511751506.pdfIn PDF document text
- http://p-energo.ru/content/file/87000382945.pdfIn PDF document text
- http://sowiik.pl/userfiles/file/tuxoresegitoxub.pdfIn PDF document text
- https://fontaine-eva.fr/userfiles/files/4075889140.pdfIn PDF document text
- http://hamkr.com/userData/board/file/kulotafor.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_off0000ea69.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEA69 | 17220 bytes |
SHA-256: db6d9db245522863b0b2ae61b2c7936b8f2f6fb8a916e1310d86f46d2345efd4 |
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font_01_sfnt_off00011740.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11740 | 11020 bytes |
SHA-256: e7e64fefcfb09178d5f0240b433011e9104118be0537bddb3b862e9e928fbd25 |
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font_02_sfnt_off000130e8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x130E8 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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