MALICIOUS
204
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF document containing embedded JavaScript and numerous links to external websites. Several heuristics indicate these links are part of a link farm hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection to these malicious URLs.
Machine Learning
- Nyx PDF Classifier malicious score 0.9974
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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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://chcial.ru/uplcv?utm_term=vsco+premium+mod+apk
- https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146edc4323dc---51453885373.pdf
- http://ukicda.com/admin/fckeditor_upfiles/file/2021091900061680554.pdf
- https://shidoremicrosys.com/media/56589591183.pdf
- https://skvely-kup.cz/files/file/jaxiso.pdf
- https://guruamardaspublicschool.com/userfiles/files/41318477506.pdf
- http://algarestofos.pnh.pt/js/ckfinder/userfiles/files/24105415322.pdf
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16132d858542bf---96130451958.pdf
- http://chiangmai-clean.com/user_img/files/jatekubatoxanosilo.pdf
- https://mama-light.net/business_school/uploads/file/86908231100.pdf
- https://igraonica.me/userfiles/file/fiwuxavimumaginofi.pdf
- http://sushinamu.com/uploads/files/motovi.pdf
- https://euforbiabulgaria.com/uploads/pages/files/85936412685.pdf
- http://pneusmarene.it/images/file/xedubebuvuzijowubam.pdf
- http://konferencii.org/web/uploads/assets/file/dowitepepami.pdf
- http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/1isagbs0r435r0dnvpftcgbj63/surimowamolatapiw.pdf
- https://stepweystudy.com/ckfinder/userfiles/files/11766769177.pdf
- https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ac56399c5ab170f97364d2e62cfa81c8/vugabanuxowovovabopabox.pdf
- http://fundacionecla.org/resources/original/file/wupiwofebifaxinuk.pdf
- http://elvirajogsi.hu/ckfinder/userfiles/files/50428423586.pdf
- https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/sfjf1ks3oknfuhd5hbpfti3i01/55714549478.pdf
- http://zentrumok.com/userfile/files/55058446829.pdf
- http://www.vegagastro.pl/upload/file/38792340669.pdf
- http://euro-ex.net/images/blog/file/49127841472.pdf
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161302e32d289c---biwajo.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_off0000e45c.bin60c3c4cd5c2f37868627fbb3c004a7616fd7cb4e567fc5f7631c45490310037d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE45C | 10588 bytes |
font_01_sfnt_off0000fc93.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFC93 | 16792 bytes |
font_02_sfnt_off000114a5.bin0a42a6ca2954099b840a9e7e7f13cdd23ae6eac0cb9c8e179fb3edd4ba5f5b26 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x114A5 | 17832 bytes |
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