MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to other PDF files hosted on various domains, some of which appear to be compromised or disposable. This suggests a multi-stage attack where the initial PDF serves as a lure to download or access further malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9963
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 https://funbugs.ie/userfiles/file/41516818659.pdf In PDF document text
- https://posaonakosovu.com/ckfinder/userfiles/files/1449589807.pdfIn PDF document text
- http://bigcool.net/webroot/img/files/36794572533.pdfIn PDF document text
- http://busangh.com/attfile/fckimg/file///2021090724558_849263729.pdfIn PDF document text
- http://xn--xhq021fvrwdth.com/d/files/45732223638.pdfIn PDF document text
- https://bokaichenyu.com/upload/files/vupinesulatoxunitajetero.pdfIn PDF document text
- https://tennis-samara.ru/img/file/domimugogot.pdfIn PDF document text
- https://shevtsov-art.com/uploads/files/78078312359.pdfIn PDF document text
- http://arkystudio.eu/userfiles/files/retijubunoxigunowow.pdfIn PDF document text
- http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3fc413526---zedinojozamak.pdfIn PDF document text
- http://indyskischool.com/ckfinder/userfiles/files/99338997944.pdfIn PDF document text
- https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdd92133ab---fosusaminodavixutufop.pdfIn PDF document text
- https://quatden.vn/webroot/img/files/lumobuvafodiraduj.pdfIn PDF document text
- https://juniorclublivorno.com/sitonews/images_upload/files/82881947008.pdfIn PDF document text
- http://hostingureitings.lv/uploads/userfiles/files/85495418928.pdfIn PDF document text
- http://ambvetesopo.eu/userfiles/files/60644271699.pdfIn PDF document text
- http://biosite.ru/images/news/file/39633907590.pdfIn PDF document text
- https://ms02bet.net/contents/files/lujegij.pdfIn PDF document text
- http://massiimo.com/piceditor/file/mokaj.pdfIn PDF document text
- https://hsse.hssanesteban.cl/files/85408559932.pdfIn PDF document text
- http://custom-mugs-factory.com/uploadfile/files/38503886182.pdfIn PDF document text
- https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/1d459a07b330af5d8485f262d92b2ede/40214660453.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=top+50+smallest+country+in+the+worldPDF 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_off0000c25d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC25D | 16564 bytes |
SHA-256: a286a6d31ef369ae1fd8acb1dda56068f322cbf15bb79b37f7f53fa0fa4530e7 |
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font_01_sfnt_off0000eca8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xECA8 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off000104bf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x104BF | 11300 bytes |
SHA-256: d7977f6b33b00c6d2236b8b7709452d11a59892f9ba7b53116871cf3c206d714 |
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