MALICIOUS
204
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 malicious PDFs. Heuristics indicate the presence of algorithmically generated URLs and links to compromised CMS upload storage, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.
Machine Learning
- Nyx PDF Classifier malicious score 0.9917
Heuristics 8
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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 to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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://cructi.ru/uplcv?utm_term=prefix+un+worksheets+1st+grade PDF link annotation
- http://hattingtoemrerogsnedker.dk/userfiles/file/55063248331.pdfIn PDF document text
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e37133085c---tamawirakazeforewezif.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71b348f921---38247654532.pdfIn PDF document text
- https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/7k4214eavrt1qmbhsvi4j1lj75/berewamoke.pdfIn PDF document text
- https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/6itafl4hf5jksbvr7ajpe3nnr2/wirotefuzegizozexu.pdfIn PDF document text
- http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/507mi7131jdni3c67iigrgh3r4/63490059854.pdfIn PDF document text
- http://erex.hu/upload/file/lekepijo.pdfIn PDF document text
- https://tadimtursu.com/image/files/pigosubofob.pdfIn PDF document text
- https://adasms.fr/userfiles/file/dajuwisosavulepijapigu.pdfIn PDF document text
- http://twothirdsmajority.us/clients/38522/File/fajikeporimexabaveweg.pdfIn PDF document text
- http://telegid.tv/userfiles/files/63441892668.pdfIn PDF document text
- http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16103658957f36---7075953856.pdfIn PDF document text
- http://nakajima-ya.com/upload/save_image/files/47362418416.pdfIn PDF document text
- https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609252bdde5df---muvixog.pdfIn PDF document text
- http://hitecds.com/userfiles/file/tugewan.pdfIn PDF document text
- http://miraesusan.com/ckupload/files/paginefugidupe.pdfIn PDF document text
- https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/8b1c095455b1cd86889f7a61b6a94d9e/38282019089.pdfIn PDF document text
- https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c84cb168e3f---votixalefozereriniwax.pdfIn PDF document text
- http://hiace-yoshikawa.com/js/upload/files/povuxiwonabojijebojanajed.pdfIn PDF document text
- https://milsagliksen.org/upload/ckfinder/files/91465991870.pdfIn PDF document text
- https://securityguardsupply.org/php/uploads/file/gawasevudu.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98e62525fd---xakukopa.pdfIn PDF document text
- http://cichanski.com/Upload/file/sirebugosawaduvus.pdfIn PDF document text
- http://iphysiology.ru/upload/zuwovilinobi.pdfIn PDF document text
- https://cleartunemonitors.com/ckfinder/userfiles/files/kerupajogoxutunepijowo.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/adjbg6dasjkmk4un6bgt4430s2/zolesukejupijemixixila.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_off0000d1a5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD1A5 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000e9bc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE9BC | 11020 bytes |
SHA-256: 14c77c3b7c7692a25d659d9e013c74654b4768ee0aff2abdb3fce77a4ed94b56 |
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font_02_sfnt_off00010342.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10342 | 17524 bytes |
SHA-256: 791fe8e124112c709862de73603c71e908fcac2f1e12622987c2e3082a83c9c6 |
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