MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple compromised WordPress upload directories and disposable hosting sites. The embedded URLs, such as 'https://krisoc.ru/uplcv?utm_term=stay+home+and+be+safe', are likely used to distribute further malicious content or conduct phishing attacks.
Machine Learning
- Nyx PDF Classifier malicious score 0.9955
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://krisoc.ru/uplcv?utm_term=stay+home+and+be+safe
- http://arablift.net/userfiles/file/geperovuzododawemise.pdf
- https://hfbee.tw/upload/ckfinder_temp/files/20210821055304.pdf
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/45971839f81a185ab35f736b3f1e7646/40544511014.pdf
- http://csc-0411.com/userfiles/file/20210803164517_lh0cjx.pdf
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/5jp1utb7ittj8es4bjil67dce0/92193784905.pdf
- https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/06dc1de732e04febd243f58cd81bbea1/wopivawumudarez.pdf
- http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f2e224c2c---rukaduzotere.pdf
- http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160edf1ec9e053---80569994562.pdf
- http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/panujofegaxoxewositu.pdf
- http://voszveszprem.hu/_user/file/rotifopuzavep.pdf
- http://hubbardfamilycircle.com/clients/62940/File/junatakadoterowerifojupi.pdf
- http://dezis.ru/uploads/files/pirunabotiwerixixowupig.pdf
- https://ahha.az/userfiles/file/wuxidogemiwinemuvelipoxat.pdf
- http://drhkltd.com/upload/gezavodu.pdf
- http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079304f42285---purad.pdf
- https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/8b4b2f06f838063b0e0fce71eda0f2e6/xozugarakonovuru.pdf
- http://yaqeen-eg.com/userfiles/file/wabor.pdf
- http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8afd06723---28350749309.pdf
- http://kondicionery-vidnoe.ru/upload_picture/file/xosufusovupiliru.pdf
- https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/lsbgp1knt85t0512h4i0qor9lh/88247033670.pdf
- http://isvpro.com/custom/files/85694333976.pdf
- https://lawyerupsmart.com/tempimg/file/finaf.pdf
- http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/36oa8b7iq2rr6or92d2uroqhl2/42576667596.pdf
- https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/vq740l5vgoavstu1ic62t6k9i1/53302623347.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_off0000e2c3.bin6023eb27044ff9de6466407047a2b57834d3bfdc4ecc96ba81f39344446960a2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE2C3 | 17228 bytes |
font_01_sfnt_off00010fd5.bin25fb3a480c8ec359c00c30946b0be5362275d97b2dbd546bdfc98cbfdc67b2dd |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10FD5 | 10708 bytes |
font_02_sfnt_off00012847.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12847 | 16792 bytes |
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