MALICIOUS
172
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and numerous external links, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9960
Heuristics 8
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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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://sanruouvang.net/images/uploaded/file/83419471897.pdf
- https://biodez.lt/i/File/lerejo.pdf
- https://hashtag.school/userfiles/file/99748201074.pdf
- http://iburgisidimarsala.eu/userfiles/files/riwasimutelitu.pdf
- https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/69a88a840db9d27ed40326214c977f63/67128275650.pdf
- https://miguktour.com/FileData/ckfinder/files/20210908_76617CAAF1DE7F41.pdf
- https://luxurybaths.marblobaths.ph/app/webroot/img/files/36607080731.pdf
- https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da3bbc1459---72693149241.pdf
- http://solarhomepage.ch/fckeditor/editor/images/file/lokokufuwenol.pdf
- http://dfwsedan.com/nbloom/fckuploads/file/kabob.pdf
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a7d0e3ba5---88758806013.pdf
- http://transbur.ru/admin/ckfinder/userfiles/files/69642689648.pdf
- https://chokysitohang.com/Uploads/userfiles/files/rokizigijinutojaxifajef.pdf
- http://letnipohar.cz/upload/file/3477334595.pdf
- https://gameadvisers.com/js/new/fckeditor/userfiles/file/sakeveneramuwopase.pdf
- https://nieruchomosciturystyczne.eu/files/file/gefuxisolokewilejubegura.pdf
- https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/c54b747c5d26abbce5fc1e93051c6ce1/83915435287.pdf
- https://ever-progress.dacola.com/upload/files/49072545336.pdf
- http://tahyuh.com/uploads/files/202109061947278720.pdf
- https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/24175777713.pdf
- http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8db57599f---kinewuwobudeni.pdf
- http://sasolution.kr/userfiles/file/jijinow.pdf
- https://mvmdigital.gr/files/files/sigonajolu.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=pokemon+sage+rom
- 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_off0000d996.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD996 | 16792 bytes |
font_01_sfnt_off0000f1ad.bin4ef5c0119883160c1ff363ae3e653444038f86cb305cc2da4264f315cb37be5b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF1AD | 10308 bytes |
font_02_sfnt_off000108eb.binbdd6e9cb243d7ed7dbc02519b7b72b6be353f00fbb91fbf3f7526d8a033c18a6 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x108EB | 18624 bytes |
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