MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. Multiple heuristics indicate the PDF is part of a link farm, with many external URIs pointing to potentially compromised or disposable hosting. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.
Machine Learning
- Nyx PDF Classifier malicious score 0.9949
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 http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/nifuseretebuziwuwe.pdf
- https://at-studio.tw/app/webroot/userfiles/files/20210909_163802.pdf
- http://yksskj.com/ckfinder/userfiles/files/79460580342.pdf
- http://www.gpe-el.pro/ckfinder/userfiles/files/9107090199.pdf
- http://fese.in/ienupdimages/images/files/robaguditin.pdf
- https://pielinks.com/UserFiles/file/pofixuvubagazuzen.pdf
- https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/i1msntjc6qc3a8279sveu7sujc/baderojejolukunedugizapo.pdf
- http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/fevebavafutizavib.pdf
- http://tipkeo.com/js/ckfinder/userfiles/files/91890988089.pdf
- http://vandientuchinhhang.com/upload/files/36140826793.pdf
- http://saothienemb.com/uploads/images/files/wiretagojixuwusatunaguruj.pdf
- http://debten.net/UserFiles/File/24630710013.pdf
- https://hzautomatisering.nl/userfiles/file/kepuwipiruwukitunezet.pdf
- https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/oeksrb6udqdg8e7r8tqd0the72/54590633158.pdf
- https://leo.tw/upload/ckeditor/files/nafejizaje.pdf
- http://www.romanschatztruhe.de/img/files/rufade.pdf
- http://ellev.fr/upload/files/werew.pdf
- https://arhstroi.by/uploads/files/59850894995.pdf
- http://effektfilm.de/files/file/88586033665.pdf
- http://gaia-onlus.org/userfiles/file/wuvofofanowopulofeno.pdf
- http://sinosteelcode.com/filespath/files/20210917040115.pdf
- http://fst-uinsu.net/userfiles/files/linadobexafuxur.pdf
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4fc7480d2.pdf
- http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/435vgnru479ecedi4ot6cjvpsi/padibisozin.pdf
- http://pol2-simf.ru/userfiles/file/wumopavedizuxibeno.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=android+1+dream+league+soccer+2020+hack
- 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_off0000d167.bin603b6844a8eedfcd74d33ba6620c6dd30b7bacbbf8503ee3fe954dce18738f8e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD167 | 19088 bytes |
font_01_sfnt_off0001036d.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1036D | 16792 bytes |
font_02_sfnt_off00011b84.bin346b020c47efed91b8ef7202a747e2b78f9978a79a23e85bbe0238378a524aaa |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11B84 | 11184 bytes |
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