MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or are part of a link farm on disposable hosting. The embedded JavaScript likely facilitates the redirection to these external sites, which are used to obscure the true malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9905
Heuristics 7
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://pistant.ru/uplcv?utm_term=how+to+change+image+size+on+android
- https://perkunasstudio.com/uploads/files/202109010454453026.pdf
- http://artkulinaria.pl/sites/default/files/file/xulef.pdf
- http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613738d94c0ea---matugufukutuzef.pdf
- http://benthanhsgfarm.net/images/uploads/files/69580699280.pdf
- https://dpt-mh.com/uploads/news/files/zanivapete.pdf
- http://begues.mobi/userfiles/file/49412251622.pdf
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161389f3c08e5c---tajefubilivozitodom.pdf
- https://clubberia.com/js/ckfinder/userfiles/files/toferuxe.pdf
- http://kimsanghun.com/upload/userfiles/file/2021931013514740.pdf
- https://jf-orvalho.pt/userfiles/file/24796730158.pdf
- http://olgapolyakova.com/files/files/xuvevofagagefe.pdf
- http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/madunorofezavufojareza.pdf
- http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c07e3dbb5---89273406321.pdf
- http://rigassprotes.lv/uploadz/file/pamapagukepuvapo.pdf
- https://fo-prefectures.com/pages/files/5477406651.pdf
- http://aasghsflqsae.handylover.com/upload/files/vokebak.pdf
- http://marchmont.ru/imgs/file/nalifevowuduxiravepori.pdf
- http://autothudo.vn/upload/fck/file/34486791710.pdf
- http://boldogelet.hu/media/makasaku.pdf
- https://myreply.mobi/snappshott/editor//file/posodinonuranaj.pdf
- https://bikidi.com/UpFiles/WebEditorFiles/file/laxuxaragov.pdf
- http://altinay-law.com/images/file/busofuluje.pdf
- https://flomogroup.com/upload/files/tiwopexupejatixowixiv.pdf
- http://tubietelbar.hu/uploadfile/64299004044.pdf
- http://matsusushionline.com/uploads/files/17789071060.pdf
- http://gordostcrista.ru/userfiles/file/4738012281.pdf
- https://zoomkish.com/basefile/zoomkishcom/files/97714343701.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_off0000e789.bin5970a8aae3896709c01ad0f7d3471b8b369bcc098a6fccc077ab6c96841d690b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE789 | 17916 bytes |
font_01_sfnt_off0001169a.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1169A | 16792 bytes |
font_02_sfnt_off00012eb1.bin8cee45e21353c1493863b43ab880a7246442c5568c09b5c3cd607b1de9be5aef |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12EB1 | 10908 bytes |
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