MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF 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, with multiple URLs pointing to potentially compromised or disposable hosting. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure suggests it's designed to redirect users to external resources.
Machine Learning
- Nyx PDF Classifier malicious score 0.5428
Heuristics 5
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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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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 http://cuspsurgeons.com/userfiles/file/86510003632.pdf In PDF document text
- https://nsaimmigration.com/userfiles/file/xovavanular.pdfIn PDF document text
- http://amirafouad.com/uploaded_files/file/15995269508.pdfIn PDF document text
- https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/zitagesijixovamofugof.pdfIn PDF document text
- https://aodaixuan.vn/app/webroot/upload/image/files/68623852757.pdfIn PDF document text
- http://kimwendelldesign.com/ckfinder/userfiles/files/71306783209.pdfIn PDF document text
- http://dxline.eu/userfiles/file/20582272501.pdfIn PDF document text
- http://xinyuemu.net/assets/202109/files/20210921063222103973.pdfIn PDF document text
- http://helenhotel.vn/upload/files/fawiteviwodiwitamuzuse.pdfIn PDF document text
- https://feniks9.ru/ckfinder/userfiles/files/23438182953.pdfIn PDF document text
- https://toananhmedical.com/uploads/files/43410632797.pdfIn PDF document text
- https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b43325104---dilupezubuxobivegel.pdfIn PDF document text
- http://ippon.lv/uploads/File/nasiba.pdfIn PDF document text
- https://soudurelausiere.ca/upload/editor/file/nimeg.pdfIn PDF document text
- https://homeuu.biz/upload/ckeditor/pages/files/sasimaki.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614955c01c2e4---nuzimawanazojoniraborire.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328a409bf19---7820636231.pdfIn PDF document text
- http://sakesushilakehavasu.com/uploads/files/nujupage.pdfIn PDF document text
- http://ausafe.net/images/art/files/6928230661.pdfIn PDF document text
- http://multi-accueil.fr/ressource/site-image/files/bibewironelerakewesaref.pdfIn PDF document text
- https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/2c91175b1339a53031aa50fecd1b2e91/14923538664.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354f9844150---wubapiwerokol.pdfIn PDF document text
- http://parmalab.it/userfiles/files/51308951619.pdfIn PDF document text
- https://balaji-technology.com/userfiles/file/bofabajidagiladubilagut.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=close+apps+on+android+tabletPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000b4cf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB4CF | 10556 bytes |
SHA-256: d6d9e4898b1319b886b6fccab691b34fb02cc43a1fd809e45101041bfa812c66 |
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font_01_sfnt_off0000ccc4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCCC4 | 16808 bytes |
SHA-256: 21b9101d8a355ac9aa95d8122a8a3d32da975dd768647643f785e3f76e5c2c92 |
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