MALICIOUS
204
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and numerous external URLs, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a fake browser update or extension, a common social engineering tactic.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
Heuristics 8
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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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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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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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 http://123dvere.sk/files/file/51264320876.pdf
- http://strahyi.ru/images/file/lejebivomaxegixogufoxozex.pdf
- https://senegal4d.com/contents/files/sobetunet.pdf
- http://sjzhtchem.com/upload/files/tibelamobuv.pdf
- http://emannsltd.com/userfiles/rudewenumalaw.pdf
- http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16136f4791e719---mijipovapusajufejumok.pdf
- http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362ebd1de34---98325763919.pdf
- http://balmybnb.com/t/tutorfirm/uploads/ck/files/22387555271.pdf
- https://mysilo.com/upload/ckfinder/files/tekadoja.pdf
- https://www.solucionaesp.com/ckfinder/userfiles/files/47509266205.pdf
- http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161431d9db922f---25146101099.pdf
- http://matsusushionline.com/uploads/files/91071506818.pdf
- https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613818fa8befb---fibijinigejakesabumupaxek.pdf
- https://perfecthospital.org/ckfinder/userfiles/files/dekexowemiseligu.pdf
- https://kurtoglumob.com/upload/file/89531771644.pdf
- http://rubella2.integra-sh.com/userfiles/file/fitowuzidaduludulinapipe.pdf
- https://navoloki.mebel18.com/uploads/files/55501653494.pdf
- http://ladyqueen.it/userfiles/files/2762674314.pdf
- http://ip-golubev.ru/ckfinder/userfiles/files/wisigivofo.pdf
- https://etest.vn/app/webroot/uploads/files/jawigunukig.pdf
- https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/ulfthnc24o8lrueo3a3is60l23/837420644.pdf
- https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/737b2318cc2d2596026c3fcc8185b739/11822855672.pdf
- http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161406570ed0c1---tenulatofozagebitu.pdf
- https://tndvn.com/js/ckfinder/userfiles/files/27821509081.pdf
- http://familiehollander.nl/images/uploadedimages/file/37626184794.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=excel+to+pdf+online2
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000dbac.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDBAC | 16792 bytes |
font_01_sfnt_off0000f3c3.bin86f7550c4908073b379ed368bf4c26041ad1a6cdc1e7744af04479b998c9a2bd |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF3C3 | 10388 bytes |
font_02_sfnt_off00010b68.bind320b6e1cc08c19dad7fc55091751aae18bb98cb9b744c166a00a4f0ee44de71 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10B68 | 17188 bytes |
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