MALICIOUS
126
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, one of which is `https://synerhu.ru/uplcv?utm_term=what+to+eat+for+breakfast+when+working+out`. The document body is heavily obfuscated, but the presence of embedded URLs and the link farm heuristic strongly suggest a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9956
Heuristics 5
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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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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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=what+to+eat+for+breakfast+when+working+out PDF link annotation
- https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/3732f271053195d1d6dca1ad4f618e11/47221735617.pdfIn PDF document text
- https://ntiverification.com/userfiles/file/12141200332.pdfIn PDF document text
- http://contua.org/userfiles/file/fasifedagidiwugan.pdfIn PDF document text
- http://inhome360.ru/admin/ckfinder/userfiles/files/bixaxerina.pdfIn PDF document text
- https://newtech-utm.pl/userfiles/file/75685910027.pdfIn PDF document text
- http://www.terresdescaraibes.fr/file/42681970397.pdfIn PDF document text
- http://nattukoottam.com/userfiles/file/32592952604.pdfIn PDF document text
- http://iburgisidimarsala.eu/userfiles/files/60600893326.pdfIn PDF document text
- https://dptech.vn/uploads/files/lirugitipilavid.pdfIn PDF document text
- http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/90950915140.pdfIn PDF document text
- http://sweed-trans.eu/ckfinder/userfiles/files/82047848187.pdfIn PDF document text
- https://nutrishop.in/ci/userfiles/files/diwulomovegoferoxudurol.pdfIn PDF document text
- https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/57917345673.pdfIn PDF document text
- https://sreekanakananda.com/ckfinder/userfiles/files/neluwizepufarobuxegugeko.pdfIn PDF document text
- https://thietkewebseo.com/webroot/img/files/54841848362.pdfIn PDF document text
- http://www.eurosecurimed.com/ckfinder/userfiles/files/65157157595.pdfIn PDF document text
- http://kisito.com/userfiles/file/kigevetofa.pdfIn PDF document text
- https://global-brand.net/userfiles/files/losirunarikopel.pdfIn PDF document text
- http://vinaktv.com/storage/ckfinder/files/satasaxeba.pdfIn PDF document text
- https://shreegroupco.com/userfiles/file/najutap.pdfIn PDF document text
- http://mariekevanvlierden.nl/survey/userfiles/files/vuvazoxukokaseku.pdfIn PDF document text
- http://nuuts.mn/uploads/assets/misubagikizaguleni.pdfIn PDF document text
- https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/161429c3c7de4b---43643322841.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_off0000b734.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB734 | 10860 bytes |
SHA-256: 3dedab41cc72bbc1a773ed1205e4b91b3e4bdce63c4d853a8bf243dcc7c42603 |
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font_01_sfnt_off0000d05a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD05A | 16164 bytes |
SHA-256: 173a03579868f6d29f4887ee99efaf81b63866b4b9f98a1bd68fedcdef40db96 |
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font_02_sfnt_off0000f979.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF979 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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