MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of multiple external URIs and a link farm structure indicates an attempt to exploit users through deceptive links, likely for phishing or malware distribution.
Machine Learning
- Nyx PDF Classifier malicious score 0.9835
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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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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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=environmental+epidemiology+book+pdf
- http://dichvutheapec.com/upload/FCK/file/45100509973.pdf
- http://jessicarossitto.com/clients/7/7c/7c16b8c799dae9ffcd1258f31d6ff645/File/74328303085.pdf
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/f6e4c6bcc37cc19f76a20373b121aeee/zabujewiwo.pdf
- https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/0uq4nr58vovku1lv81s97q768i/78224104745.pdf
- http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d08a9d44748---dilagoremi.pdf
- https://residenciasanamaro.es/userfiles/files/44582812845.pdf
- http://longarmquiltingacadamy.com/fckeditor/userfiles/file/77586443263.pdf
- https://asztromiskolc.hu/ckfinder/userfiles/files/novon.pdf
- http://aceonlinementors.com/userfiles/file/kusupifugeginasidizomebar.pdf
- http://richwoods1969.com/clients/861079/File/wutepuponodiso.pdf
- http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/patogabewoxamefujileze.pdf
- http://mhinflatable.com/upload/file/zunadanuzaxevelixoleba.pdf
- https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/p1u9ernd5rbaj8sol27aldiulo/vatozodawa.pdf
- http://ukonlinedirect.com/userfiles/files/difuzefelulibe.pdf
- http://sitarofindiamd.com/userfiles/file/99331287890.pdf
- https://ambalatender.com/upload/files/xasiwavewijato.pdf
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607005e2b9368---dovazutobaradamu.pdf
- http://dianacb.cz/userfiles/file/zalodakesu.pdf
- http://marketherballize.com/ckfinder/userfiles/files/51751489373.pdf
- http://yljx.cn/images/upload/File/jizirixuputafowifupufed.pdf
- http://csc028.com/userfiles/file/20210814105436_g7uzvh.pdf
- http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/m6h3t99omd937da2lcl3itr6tq/junizogeruto.pdf
- https://eyetracking.pl/userfiles/file/sinirurerogoporumatuz.pdf
- https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d76eeb9a0a---1421566280.pdf
- http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608f58c235d55---xuxobizeberakusupajorob.pdf
- https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160827f41d8560---lupabuvemegevurogulerugog.pdf
- 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_off00010cdd.bin060e7bf62a6bb01acb86a050914b6e5fcf179b6aeb0d8e1f071647e5609cd112 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10CDD | 18732 bytes |
font_01_sfnt_off00013d2c.bin3276f1db272a2f21296094d7b6e11b4c67f67793c09d299f3248fd38200bf19d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13D2C | 11068 bytes |
font_02_sfnt_off0001567f.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1567F | 16792 bytes |
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