MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF file detected by ClamAV as Pdf.Phishing.Trojan. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
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://inwebjor.ru/uplcv?utm_term=instalar+ubuntu+touch+en+cualquier+android
- http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/161325c4c76654---xovelogugo.pdf
- http://m-styleauto.com/js/upload/files/75218223783.pdf
- http://jiin-torng.com/uploadfiles/20210916124415.pdf
- http://www.northern-japan.com/image/upload/File/gitopiwazuzuso.pdf
- https://svltv.in/userfiles/files/pivavoxafofu.pdf
- http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161365568d74e8---mowalutupefare.pdf
- http://dailyliving.nl/ckfinder/userfiles/files/worubiwubirefijibuzozo.pdf
- https://rireenfrance.com/images/upload/files/64433234279.pdf
- http://mytrangroup.com/uploads/userfiles/file/43339015784.pdf
- https://qfse.co/images/uploaded_files/ckfinder/files/1631861974_42fb376eb4.pdf
- https://receptabc.hu/images_banner/files/8600158756.pdf
- http://domplus.su/userfiles/files/towuvigalomaguto.pdf
- http://zvezda-rostov.ru/ckfinder/userfiles/files/bodobeladosu.pdf
- http://archiw.bibliotekalesmierz.eu/img/upload/files/43855120278.pdf
- http://kovofilm.cz/userfiles/file/68101998958.pdf
- https://jkmart.net/FCKFiles/File/dubetuser.pdf
- https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132ad4508a16---7789467299.pdf
- https://ost-fogging.com/upload/files/57750134714.pdf
- http://gcsiva.com/files/userfiles/file/mofejiga.pdf
- http://doks-films.com/pcms/content/file/51543476428.pdf
- http://savvyais.com/userfiles/file/mawakewuje.pdf
- http://zbirozskepodzamci.cz/userfiles/nifikaxujimif.pdf
- https://mwasafat.com/uploads/files/2831943486.pdf
- https://kentacademymiango.com/userfiles/file/jexasuvapivak.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_off0000b869.bin6804c655f8aa45c3cc47f74f4fefedc6058ebdf488fbb61ec26b6c761f35ff49 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB869 | 10804 bytes |
font_01_sfnt_off0000d100.bin2c46521245e61e901e4f93e604e76cdb5c6e709de3695b5a71f98c574ade5f73 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD100 | 18088 bytes |
font_02_sfnt_off0000fe7d.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFE7D | 16792 bytes |
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