MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm or redirection scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. While no scripts were extracted, the nature of the URLs and the ML classifier's high confidence score point towards a malicious document, likely delivered via spearphishing, designed to redirect users to potentially harmful content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9965
Heuristics 5
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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://laborke.ru/uplcv?utm_term=good+words+that+start+with+h PDF link annotation
- http://nineslash.com/user_file/file/nemiwatafazipifu.pdfIn PDF document text
- http://jyy.jp/ckfinder/userfiles/files/20210917_182524.pdfIn PDF document text
- http://joyear.com/ckfinder/userfiles/files/josavilosoramej.pdfIn PDF document text
- https://kingcom.edesign.fr/gr33/web/uploads/assets/file/33830701557.pdfIn PDF document text
- http://ceraunavoltapizzeria.it/userfiles/files/firini.pdfIn PDF document text
- http://dagmare.de/userfiles/file/71078827465.pdfIn PDF document text
- https://umutisi.com/umut/upload/files/30743875024.pdfIn PDF document text
- https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/99a4c484b60ebe8d77c94731c252b7e1/wiritub.pdfIn PDF document text
- http://17njl.com/userfiles/files/bakuluxorisawofuxubabi.pdfIn PDF document text
- http://campbellelectronics.com/uploads/59610269549.pdfIn PDF document text
- http://vitrine-prof.com/files/mafevafaden.pdfIn PDF document text
- http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613305ec39975---lubegide.pdfIn PDF document text
- http://webbuilders.com/files/file/90420624640.pdfIn PDF document text
- http://spbi.cz/res/file/menuxarivunagudapame.pdfIn PDF document text
- http://huntland.hu/upload/file/vivodetufuvo.pdfIn PDF document text
- https://letstravelforacause.com/miet/assets/files/89587125935.pdfIn PDF document text
- https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/bdc10126c2711d857ea9fb29b9b671b6/kofuzoluxomugasu.pdfIn PDF document text
- http://wintec-samu.hu/uploads/files/kesubosi.pdfIn PDF document text
- https://etadelloro.it/images/file/filinogum.pdfIn PDF document text
- http://bright-mineral.com/uploadfile/file/2021090613503935.pdfIn PDF document text
- http://jan-fotografie.nl/upload/files/vasoruxibarukekirivubuwoj.pdfIn PDF document text
- http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/rarotupozejiwi.pdfIn PDF document text
- 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_off0000b0ff.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB0FF | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000c911.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC911 | 16484 bytes |
SHA-256: 541c5bd6c91cdef33969f266e7ffcec2307518c2949291fba6676c796974561c |
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font_02_sfnt_off0000f362.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF362 | 10188 bytes |
SHA-256: c4d412d307b07b9b5c8f00ab75b0837fc069d2fe6bd161244020fd21a56f1daa |
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