MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It functions as a link farm, with numerous embedded URLs pointing to other PDF files hosted on various domains, some of which appear to be compromised CMS uploads. This suggests a multi-stage attack where the initial PDF serves as a lure to redirect users to malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9973
Heuristics 6
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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 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 http://piotrkowska77.pl/zdjeciafile/gubagapalejonotu.pdf In PDF document text
- http://design-klasse.de/ckfinder/userfiles/files/gesafeju.pdfIn PDF document text
- http://dooroc.com/tk/upload/file/35746260993.pdfIn PDF document text
- http://selidbe-beograd.info/files/jipusejojunusegavoku.pdfIn PDF document text
- http://corporatiegids.nl/uploads/files/51922148526.pdfIn PDF document text
- http://sosnovgeo.ru/userfiles/file/losanened.pdfIn PDF document text
- https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/d8a31fcebfeb12870478bfb4c36e2a05/zukozatajat.pdfIn PDF document text
- https://avistravel.ro/userfiles/file/lidorixuxapolubapuzi.pdfIn PDF document text
- http://sicilyontable.it/userfiles/files/58027298567.pdfIn PDF document text
- http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0d81c4ce6---18300057928.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393a7ea61dd---niwofipazigerafipudakuxo.pdfIn PDF document text
- https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2cbbb8f3a---fefivaxizukakiponexe.pdfIn PDF document text
- http://ipsaix.com/ckeditor/ckfinder/userfiles/files/76601603913.pdfIn PDF document text
- https://dunaweb.co/bg_image/files/lagotekorapef.pdfIn PDF document text
- https://techlan.pl/files/file/87629562453.pdfIn PDF document text
- http://xn--9w3b11kh5l.com/ckupload/files/86115026801.pdfIn PDF document text
- http://consol.hu/images/uploadedimages/file/45086470524.pdfIn PDF document text
- https://pakianco.ir/data/image/uploads/news/files/30184348102.pdfIn PDF document text
- http://studiochiodo.eu/userfiles/files/katalabogojut.pdfIn PDF document text
- https://commonlawhouse.in/userfiles/file/8437942958.pdfIn PDF document text
- http://sinners-party.de/media/file/39501643005.pdfIn PDF document text
- http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/45626291536.pdfIn PDF document text
- http://tmkb.org.tr/ckfinder/userfiles/files/pubezifonisajisijeve.pdfIn PDF document text
- https://beta.nhatthiengroup.com/files/uploaded/files/kapogo.pdfIn PDF document text
- http://arredamentoambienti.it/img/file/46509040970.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=free+preschool+books+pdfPDF link annotation
- 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_off0000f984.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF984 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off00011196.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11196 | 17196 bytes |
SHA-256: 6273aa03795bd0c7eddca1656e974f7b57b7cb5cb28f26864a5c4d163a7b75a9 |
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font_02_sfnt_off00013e2a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13E2A | 10468 bytes |
SHA-256: 4435c9febcf87b2ca1aa8522898ae055bfcf4edbbf2f47c477e3faa9cfb098b5 |
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