MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised WordPress sites and disposable domains, suggesting a phishing or redirection scheme. Although no scripts were explicitly extracted, the PDF format often utilizes embedded JavaScript for malicious actions, and the presence of numerous external URIs points towards a phishing attack.
Machine Learning
- Nyx PDF Classifier malicious score 0.9947
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://synerhu.ru/uplcv?utm_term=zen+bound+android
- https://maydangson.com/vietkiendo/upload/file/fijuxojovabiruwi.pdf
- http://gyogytornasziget.hu/uploads/files/72293994572.pdf
- http://smelawservice.com/file_media/file_image/file/gunuvowufelatukuwoto.pdf
- https://mediaskills.rs/files/xamatatuzire.pdf
- http://elsped.hu/files/file/febemo.pdf
- https://adverto.ee/userfiles/file/fibabaxupuwisixawo.pdf
- https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/429292a9c3581364e1471878a7310cf0/vasesuvogizafinurofibin.pdf
- http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb796cc752---78243914631.pdf
- http://atol-res.pl/uploads/file/38540058323.pdf
- https://www.prieur-equipement.com/ckfinder/userfiles/files/ridatajubewi.pdf
- http://bonezi.morefriendship.com/upload/files/18837339927.pdf
- https://fereshtegan.net/basefile/fereshtegannet/files/tekepapun.pdf
- http://www.biogreeno.com/cms/ckfinder/userfiles/files/felovufivumunodofesoko.pdf
- http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614d7a98b7fdc---runotem.pdf
- http://qianshunqs.com/admin/upload/64751988608.pdf
- http://salamino.pl/userfiles/file/fikavajumakopabefemusu.pdf
- https://chingchia.com/uploads/files/202109060236381999.pdf
- http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xolepazomesilajoxabozerav.pdf
- http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614546e23d396---10654316652.pdf
- http://ryanoomen.nl/uploadimages/files/68091455502.pdf
- https://alev.az/userfiles/file/85660113150.pdf
- http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/98274639459.pdf
- https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/34d5db7127bcebfb5b1963e3954eed74/22804068288.pdf
- http://botosani.ro/img/uploads/file/xijejiteruma.pdf
- http://coomargroup.com/ckfinder/userfiles/files/surawebivar.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_off0000b33b.binb787f9fb0baafc0a8246138b3e7b22c1b12d26156e96f894141ce4035f5c61e7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB33B | 17924 bytes |
font_01_sfnt_off0000e0f5.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE0F5 | 16792 bytes |
font_02_sfnt_off0000f90c.bin14b247069c1eac11a82f9ae1a645c46e4b906214f686f3cca7ced26e50e30a94 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF90C | 10132 bytes |
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