MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which are part of a link farm hosted on disposable or compromised domains, suggesting a phishing or malware distribution campaign. The presence of an embedded JavaScript stream further supports malicious activity, likely for obfuscation or redirection.
Machine Learning
- Nyx PDF Classifier malicious score 0.9982
Heuristics 7
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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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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 https://synerhu.ru/uplcv?utm_term=signing+over+legal+guardianship PDF link annotation
- http://edmo-cars.nl/images/file/jonirusoxotexi.pdfIn PDF document text
- https://harshahometutors.com/uniformkontakt/userfiles/image/files/gabuzavemelunuju.pdfIn PDF document text
- http://vpsystem.com/files/fck/tojir.pdfIn PDF document text
- https://sabagdasarov.ru/upload/file/zanowonulosegubawo.pdfIn PDF document text
- https://stealthwindow.tw/uploads/files/202109080521529663.pdfIn PDF document text
- https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdab96232b---pojumetasapogetixexep.pdfIn PDF document text
- http://www.benyowsky.com/resources/files/sujixifedariro.pdfIn PDF document text
- https://aucordechasse.fr/vosImages/towegunaxelobidove.pdfIn PDF document text
- http://tianlanip.com/filespath/files/20211005012902.pdfIn PDF document text
- https://rjpexport.com/files/94988483530.pdfIn PDF document text
- http://vertex-decor.com/userfiles/file/39413992775.pdfIn PDF document text
- http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/53795593363.pdfIn PDF document text
- http://studiosimonepantaleo.it/userfiles/files/53040778973.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613099d3e968a---wisoratezopipipisurutuse.pdfIn PDF document text
- https://madhubanindiancuisine.com/nbloom/fckuploads/file/22351189694.pdfIn PDF document text
- https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/r9ebt61mvbs1a2j3i4fcj7tqa4/22017499196.pdfIn PDF document text
- http://naoshima-tours.com/images/blog/file/fuwudaw.pdfIn PDF document text
- http://arcos-eff.it/userfiles/files/nujonososawepufodovep.pdfIn PDF document text
- https://www.borzabadi.com/ckfinder/userfiles/files/1456572585.pdfIn PDF document text
- https://n-tlg.com/files/file/dasedezikokotulewopow.pdfIn PDF document text
- https://argekaucuk.com/nbg/upload/files/32504290375.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_off0000fed7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFED7 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off000116e9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x116E9 | 20924 bytes |
SHA-256: c621ff624db932594d9bae4f5e5aa553ee433c347457c9a38d000669c9209010 |
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font_02_sfnt_off00014bf8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14BF8 | 10812 bytes |
SHA-256: 190cbb6e4e1da0a4852257c09a2a2aafdd05e48221d1bb7ed944df41be55932b |
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