MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains a link farm pointing to numerous other PDF files hosted on compromised websites, indicating a phishing or malware distribution attempt. ClamAV and ML classifiers strongly indicate maliciousness, and the structure suggests it's part of a larger campaign to lure victims to malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9964
Heuristics 6
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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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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://study-go.info/wp-content/plugins/super-forms/uploads/php/files/f6aba48944a61b8672f750320524519e/83221520551.pdf
- https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/1a26koqu6b0ia02m3rp10r04f2/60257736090.pdf
- http://ledseoul.com/userData/board/file/gonepim.pdf
- http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0886d07ca4---77178981000.pdf
- https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/eb6216ace521d30a8ccb2c5533d9ef53/pefadir.pdf
- http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/8a9f0f19e42026df8c96b8ef8663d1a4/tipukejupofivijuwojekeka.pdf
- http://musorcentrum.hu/files/article/file/miruxagomulafufuz.pdf
- http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/i4f4n4oh7a0vmao2gdh8aq6715/44641620085.pdf
- https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cf4d951a3---vujoraruvefevamaxevanuvuv.pdf
- https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/43add541a5af355ffe72dbc95aacabc8/vukorukufuri.pdf
- https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/41e8717faba2312e6423b5cf368ec818/51842372972.pdf
- https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/9grl70ta9uucgdmfo06gr790sm/48741105538.pdf
- http://denis-lefebvre-services.com/fichiers/file/gilasoliwumexil.pdf
- https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/8b3e20df9e0e506f16f537e541b8a531/xipegefezabidovofu.pdf
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/mmvultubpequlaelkubs16mku0/riwilugawaruserepawojumi.pdf
- http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709d705ed5e---40745427793.pdf
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4d8153b1d---pedojovoremazof.pdf
- http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ff67d4129---rusog.pdf
- https://alarrabnews.com/images/content/content/file/69622790270.pdf
- https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/e0f67162517e3893e29d6564d33ff78a/fuvelirefi.pdf
- https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/38bdd63a9d056237eb2ff9e87288871b/41934905777.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=calculate+hydrogen+ion+concentration+from+ph
- 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_off000124d9.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x124D9 | 16792 bytes |
font_01_sfnt_off00013cf0.binebb9c626d7fc1cb95da176501688385026fe949e77c9ed9be44f047433d7b480 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13CF0 | 11144 bytes |
font_02_sfnt_off00015699.bin570c0ec7f56192063dd7b3855b352207f795486015ec7b15a1243391da860043 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x15699 | 19696 bytes |
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