MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic strongly suggests a social engineering tactic to trick users into installing malicious software disguised as a browser update or extension. The presence of numerous external URLs, including one pointing to 'nomylo.ru', further supports the malicious nature, likely serving as download or redirection points for the payload. No scripts were extracted, but the PDF structure and heuristics point towards a phishing or malware delivery mechanism.
Machine Learning
- Nyx PDF Classifier malicious score 0.9956
Heuristics 6
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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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Browser extension / update installation lure high SE_BROWSER_INSTALL_LUREDocument tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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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://nomylo.ru/uplcv?utm_term=starmaker+lite+apk+download+old+version PDF link annotation
- http://cukiernia.eu/upload/files/vopufepufurisitopufuduxo.pdfIn PDF document text
- http://cnokorea.com/userfiles/file/17520023839.pdfIn PDF document text
- https://rocksoliddesigns.biz/userfiles/file/68679739387.pdfIn PDF document text
- http://zaun-produzent.de/userfiles/file/zemejoro.pdfIn PDF document text
- https://elsadaulte.com/ckfinder/userfiles/files/93748523694.pdfIn PDF document text
- https://kangaroovietuc.vn/webroot/img/files/99568587886.pdfIn PDF document text
- https://robindayne.com/ckfinder/userfiles/files/20311183575.pdfIn PDF document text
- http://vedepcuaem.com/luutru/files/59541130767.pdfIn PDF document text
- http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614038c59e7ee---tapojojisiselukusogugo.pdfIn PDF document text
- http://www.hz-kontejnery.cz/ckfinder/userfiles/files/pekuzof.pdfIn PDF document text
- http://udelimpa.es/ckfinder/userfiles/files/refiduzesakegatu.pdfIn PDF document text
- https://eldorado777.ro/upload/editor/file/88252652414.pdfIn PDF document text
- http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/76663366753.pdfIn PDF document text
- http://fairfresh.net/assets/admin/ckeditorimage/files/doziwanegijam.pdfIn PDF document text
- http://www.eau-msu.ru/ckfinder/userfiles/files/feripejisaxewopufip.pdfIn PDF document text
- http://www.jindatunnel.com/up_files/file/vusutiruwezivabewo.pdfIn PDF document text
- https://rcvizovice.cz/ckfinder/userfiles/files/95224613144.pdfIn PDF document text
- http://finchamauto.com/pics/talupedawuxajozifelazug.pdfIn PDF document text
- https://alatheir.com/atheirwsfiles/file/60845934089.pdfIn PDF document text
- http://senvietsystem.com/ckeditor/upload/files/33085257884.pdfIn PDF document text
- http://fratellibeninca.com/images/file/11625402695.pdfIn PDF document text
- https://taperagi.com/contents/files/derogasikero.pdfIn PDF document text
- https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/b8fee5196bff1a15609515a2a00efd82/41912088774.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_off0000e3c7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE3C7 | 19708 bytes |
SHA-256: f4630ee4e7d0eca63102d348b67b2e4506eeee5891bd0a22b28550d28dd07deb |
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font_01_sfnt_off00011714.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11714 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00012f2b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12F2B | 10872 bytes |
SHA-256: a4cd3c6c85e35559a2770011bd098320e7fac8dec629880e02fb9795dac5053f |
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