MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file contains a link farm that redirects to multiple PDF files hosted on various domains, some of which appear to be compromised CMS uploads. The presence of a 'utm_term=download free psiphon for android' URL suggests a lure for users seeking specific software, likely leading to malware. The ML classifier also strongly indicated maliciousness.
Machine Learning
- Nyx PDF Classifier malicious score 0.9909
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://huntic.ru/uplcv?utm_term=download+free+psiphon+for+android
- http://daegyung.kr/userfiles/file/20210910013609.pdf
- http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86559291979.pdf
- http://www.ctmmaximoravenna.com/ckfinder/userfiles/files/845746509.pdf
- http://cheniou.handysociality.com/upload/files/loporuzutobij.pdf
- https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/3eebd9851b57593bfe994715f3526d39/65017871083.pdf
- http://naturpix.ch/cmsimages/file/7062262344.pdf
- http://insureavisitor.com/userfiles/file/bagokibapulakes.pdf
- http://notariocprietoa.com/notaria/documentos/files/86947338946.pdf
- http://akinmedikal.com/uploads/file/50602763022.pdf
- http://www.singchai.co.th/ckfinder/userfiles/files/87636369083.pdf
- http://studioagm.it/userfiles/files/zewuvadamova.pdf
- https://beautydiction.com/ckfinder/userfiles/files/32828215529.pdf
- http://ckm-machinery.com/userfiles/files/60844148379.pdf
- http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1118a8578---xopeduzi.pdf
- http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/38385792229.pdf
- http://k12kos.com/ckfinder/userfiles/files/54039291870.pdf
- https://10playsolutions.com/clients/softklk/documents/_articles_/file/52989186797.pdf
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396bac1cd25---kunajozosajupivowuzow.pdf
- https://sealskinz.ru/files/file/renirevunudenadogazinu.pdf
- http://ewtch.com/upload/files/76700141855.pdf
- http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/zofapekisew.pdf
- https://muzpony.de/obrazki/file/12546334782.pdf
- http://netflor.pl/upload/File/dubewised.pdf
- https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/delupawa.pdf
- https://careerroots.net/ckfinder/userfiles/files/nurafafoziwujikizibuvos.pdf
- https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d65dc5e36---50488247835.pdf
- https://www.borzabadi.com/ckfinder/userfiles/files/62205005598.pdf
- http://www.cpiequipos.com/assets/images/user_files/files/zosudigixukaxe.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_off0000b738.bin355a8f12411ef237a04b8c71d7f3baa696031091c5614ee45a4ee67722c1e181 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB738 | 14812 bytes |
font_01_sfnt_off0000dbea.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDBEA | 16792 bytes |
font_02_sfnt_off0000f401.binc9e071f81fc9db954f8e1bfceb4675c814e5cfea110d9a8a4d88bb8f166f1867 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF401 | 10584 bytes |
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