MALICIOUS
112
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and numerous links to external PDFs hosted on compromised websites, suggesting it's part of a link farm designed to distribute malware. The ML classifier strongly flagged this PDF as malicious. The embedded JavaScript likely facilitates the download and execution of a second-stage payload from one of the linked URLs.
Machine Learning
- Nyx PDF Classifier malicious score 0.9991
Heuristics 7
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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/4o85o2g20421b0m9oc17t9dja6/duxipenuxuzavofot.pdf
- http://www.asap-recruitment.net/upload/file/palufexozeko.pdf
- http://vuonlan.vn/data/upload/files/9871343001.pdf
- http://gamjagolla.com/uploads/files/99496746979.pdf
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090b763ef51e---wojobewaxakulajew.pdf
- http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160784edab1c01---55925227933.pdf
- https://escaletravel.com/userfiles/files/19450133593.pdf
- http://kasaitogo.com/uploads/files/18319844239.pdf
- https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/8lnqp9omojekhpqlmajohpf6mo/39500582908.pdf
- http://libertyquad72.fr/userfiles/file/9029219747.pdf
- http://auksozvynas.lt/userfiles/file/jawipejazinadatipotarixev.pdf
- https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/34bf66fa5c732c6118d44a6dfd1ca76f/nogatowubozubafo.pdf
- http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/19542590774.pdf
- http://fabtur.ru/upload/files/25632201795.pdf
- http://519pf.com/userfiles/files/kexibipajonuje.pdf
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852e7699802---kumenobovarepovopuj.pdf
- https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076c0982273d---kolibegenadivomolovazo.pdf
- http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d21b55895---69575016.pdf
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160d82eaed97e3---94988650281.pdf
- https://kiaavcilar.com/upload/ckfinder/files/56353040032.pdf
- http://open.ua/uploads/ckeditor/files/mufolakufafidupafis.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=angry+birds+star+wars+2+old+version+apk
- 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_off0000e31a.bin359a9c4d9d0a3b30811a6cb20da62760e30f563dcde9bb0d4ee325c0347b90ee |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE31A | 18676 bytes |
font_01_sfnt_off000111e1.binaad6ddaf53fe230a15f1485eeab0ff90c502a9acdb1c412490e2c1038b264081 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x111E1 | 11164 bytes |
font_02_sfnt_off00012bd8.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12BD8 | 16792 bytes |
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