MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF file containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF also contains numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.
Machine Learning
- Nyx PDF Classifier malicious score 0.9939
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://ketchas.ru/uplcv?utm_term=elimination+of+arbitrary+constants+by+differentiation+pdf PDF link annotation
- https://amadesafar.ir/basefile/amadesafarir/files/53955618547.pdfIn PDF document text
- https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/fbd0022a1a5f0b0c89d2a4fc163b659e/midar.pdfIn PDF document text
- https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/51g86sna86ml8adkkll3vmv61i/posixirarok.pdfIn PDF document text
- http://czapla-dachy.pl/public/images/fck/file/mijejasuxivubodoregamo.pdfIn PDF document text
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5741e2bb6fc836d9330cdc57d24b6dec/muwikeganojat.pdfIn PDF document text
- http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081d42b6a325---kiwexo.pdfIn PDF document text
- https://kibledergisi.net/resimler/files/93837801849.pdfIn PDF document text
- https://www.hkha.org/ckfinder/userfiles/files/besikelotemejesawopevaso.pdfIn PDF document text
- https://medius.sk/userfiles/file/julajexo.pdfIn PDF document text
- http://creptiles.dk/userfiles/file/82708766914.pdfIn PDF document text
- http://superplasticizer.cn/d/files/libulupizapuragekid.pdfIn PDF document text
- https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/4bbd60a526671bf3e9533eb986e3212c/11083400090.pdfIn PDF document text
- https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/66636c31cc20178111b9aaf334e56c51/4202498812.pdfIn PDF document text
- https://chinatupai.com/web/js/ckfinder/userfiles/files/vawuzanonenu.pdfIn PDF document text
- http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8d6e74dfb---noxitovokajuv.pdfIn PDF document text
- http://seoulsquare.com/userfiles/file/32301606064.pdfIn PDF document text
- https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1611ae5bbc6e64---34458681519.pdfIn PDF document text
- https://cihangirhotel.com/upload/ckfinder/files/51588582047.pdfIn PDF document text
- https://www.pepinieres-gey.fr/ckfinder/userfiles/files/muresamululopedaxezi.pdfIn PDF document text
- http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/kajetejomaj.pdfIn PDF document text
- http://mamtomchabahai.com/uploads/files/files/kabipalajubi.pdfIn PDF document text
- http://azizolace.cz/images/file/vukoto.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160757c9489899---97561157212.pdfIn PDF document text
- http://eyela.kr/uploadfile/fckeditor/file/logado.pdfIn PDF document text
- http://telek-trans.hu/editor_up/todixijolu.pdfIn PDF document text
- https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/3ubea6ur7t54h58uffolpk73r1/41337585622.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_off0000c1e4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC1E4 | 16620 bytes |
SHA-256: 2aa75c93cee0669d911d8da849b975ce0a2bfa2e32782f19edca23b99cf12564 |
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font_01_sfnt_off0000ec5f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEC5F | 11016 bytes |
SHA-256: 701a31c42c141e68ff7add9f669f6d6b35c234ed76833e83c613bab9004b3b6b |
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font_02_sfnt_off000105c3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x105C3 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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