MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF containing embedded JavaScript and a large number of external URIs. The heuristics indicate a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or SEO poisoning campaign. The embedded JavaScript likely facilitates the redirection or further malicious activity.
Machine Learning
- Nyx PDF Classifier malicious score 0.9868
Heuristics 7
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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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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://pistant.ru/uplcv?utm_term=what+does+ig+stand+for+in+a+text
- http://1137.jp/app/webroot/js/ckfinder/userfiles/files/bepexut.pdf
- https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/74e89f117045ad0242684c016e6ddeed/50099918359.pdf
- http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e3a17b3e0---80634531267.pdf
- http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/83689759919.pdf
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/13b5f86bc15f5e04cb1d4dd530c144a6/6135914475.pdf
- https://jokerprod.net/userfiles/file/1029520182.pdf
- https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/13293a70c835278a00544839f276a748/xazumojulufubamomuribuk.pdf
- http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a1d6494d2---27838572761.pdf
- https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/35546382528.pdf
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a263ca5729f---kufosibomadev.pdf
- https://bselink.com/userfiles/file/pulifelibo.pdf
- https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/6fd612eaa1989623526654bb79570bc7/kifadilofofaraxun.pdf
- http://biosite.ru/images/news/file/rikifonulokerugusa.pdf
- http://taketty.xyz/js/ckfinder/userfiles/files/zomerovadofuj.pdf
- http://fouladsazanco.com/Upload/file/78819223154.pdf
- http://mousike.it/img_ins/files/wizolizusane.pdf
- https://thegioidongphuc.net/ckfinder/userfiles/files/rovewojafodozasilix.pdf
- http://grupophi.es/uploads/files/25292766393.pdf
- http://akgikorea.com/file_upload/fck_upfile/file/mubobojugezek.pdf
- https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/7mi3ue96plh9ui7fs0p1tt1a90/tuwozavogelekov.pdf
- https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/82f4c7079a3256de196f463e06c2bf10/82245650646.pdf
- http://chongthamnguoc.vn/img/files/nimupedumaxivejiname.pdf
- http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/2105310019513978388odroz.pdf
- http://musicpark-live.de/userfiles/file/dofagik.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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00013163.bin9c4742a42948b304861e8b9fe7a928c6a07004c838732a3b507d12f75dccde60 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13163 | 16528 bytes |
font_01_sfnt_off0001481e.bin29835b001cbb00e5b37e8ee095e78c0e8fd61bbee13e9d1512bd529364d8675a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1481E | 20268 bytes |
font_02_sfnt_off00017cf2.bine7328dcc1c822bb8c1140a0380deddb199af2a0cb76cee5d610178ae5d37029d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x17CF2 | 10684 bytes |
font_03_sfnt_off0001953e.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1953E | 16792 bytes |
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