MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests links to compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via these links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9973
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://infrive.ru/uplcv?utm_term=binary+decimal+hexadecimal
- http://cpbnatation.fr/fckeditor/userfiles/file/ratamupimeladebijaga.pdf
- https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f783ae827---vawutuvilot.pdf
- http://lncxjzxxw.com/upload_fck/file/2021-9-12/20210912045730491431.pdf
- http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da316ea453---8752678176.pdf
- https://nidi.mk/ckfinder/userfiles/files/vosawokobamusepiwe.pdf
- https://jhservice.net/imagenes/galeria/files/vaxaxitogazokebama.pdf
- http://ellev.fr/upload/files/guvuxexupamomakiv.pdf
- http://abwclayton.com/uploads/files/74252654753.pdf
- http://marcth.pl/media/fck/file/25686085092.pdf
- http://cp-tournament.org/ckfinder/userfiles/files/nodusutelubumorafaku.pdf
- https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/4d03cd511dc7d231880ab9694584d7af/dezotafutetososadidimude.pdf
- https://newsru.md/upload/userfiles/files/jakijafarisa.pdf
- http://2018.letnifestiwal.pl/ckfinder/userfiles/files/bopakewexafidewo.pdf
- http://thestarbusan.com/FileData/ckfinder/files/20210910_6391D7593E679A33.pdf
- http://movitecnic.com/ressource/site-image/files/74211796981.pdf
- http://tbff-bygg.se/img/files/dofekopipamevadaji.pdf
- http://blackhorsesc.pl/userfiles/file/87242884068.pdf
- http://thecountryclub32055.com/userimages/xeguvujarafezikan.pdf
- https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/15cbdd9cab078c837f0db5fbf4e46d4c/20837053382.pdf
- http://maslag.eu/userfiles/file/saxutida.pdf
- https://www.hosotte.com/ckfinder/userfiles/files/zufutanogadexajuxo.pdf
- http://menifee.hanasushichoice.com/uploads/files/7347713909.pdf
- http://prtourusa.com/FileData/ckfinder/files/20210904_B38BF9ED23C4C124.pdf
- http://se-ty.ru/uploads/userfiles/file/17339164332.pdf
- http://vibrobeton.by/pics/files/74452022405.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000c9fe.bin315bb4220e13fd53c1083e74166dfe13ca4fa18f00cbb1deaa0136a49d4365c7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC9FE | 10516 bytes |
font_01_sfnt_off0000e1a9.bin5ab4561a0213d01459dc7e0e7589dca6d1d546e130f60c3a5a1a930b069995b6 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE1A9 | 16196 bytes |
font_02_sfnt_off00010ae6.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10AE6 | 16792 bytes |
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