MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The ML classifier and ClamAV heuristic strongly indicate this PDF is malicious. It contains numerous URLs that form a link farm, with several pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final malicious destination. The presence of a 'hack zoom app download' UTM term in one URL indicates a potential lure for users seeking software, which is a common phishing tactic.
Machine Learning
- Nyx PDF Classifier malicious score 0.9991
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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://catamma.ru/uplcv?utm_term=hack+zoom+app+download+voice+changer PDF link annotation
- https://leise.ru/admin/ckfinder/userfiles/files/11299765089.pdfIn PDF document text
- https://myphambambi.com/webroot/img/files/33583891624.pdfIn PDF document text
- http://xedaphcm.com/luutru/files/polobuvigidedokumot.pdfIn PDF document text
- http://openendrep.com/userfiles/files/12741376561.pdfIn PDF document text
- https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d32847313---15830544166.pdfIn PDF document text
- http://koszyczarek.pl/userfiles/file/23865710168.pdfIn PDF document text
- http://studiocalcinoni.com/userfiles/files/16146826748.pdfIn PDF document text
- http://njbeihang.com/uploadfile/file///2021090800560859.pdfIn PDF document text
- http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161483477b551f---30034348775.pdfIn PDF document text
- http://ks-system.co.uk/ckfinder/userfiles/files/keduxekulutifupojebepagez.pdfIn PDF document text
- https://omprintandpack.com/userfiles/file/76747855887.pdfIn PDF document text
- http://hophungvietnam.com/app/webroot/uploads/files/nesoladapax.pdfIn PDF document text
- http://przyrodnik-kujawy.eu/userfiles/file/lidanefebezikita.pdfIn PDF document text
- http://polskienarty.pl/data/aktualnosci_imgs/file/katupejusogasaf.pdfIn PDF document text
- http://koreabulk.net/userData/board/file/1167648106.pdfIn PDF document text
- http://cafegreenwichvillage.com/uploads/files/pigupuxajufibo.pdfIn PDF document text
- https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2d976fb2b---fokeposarokoni.pdfIn PDF document text
- http://maroba-zirndorf.de/file/40971397957.pdfIn PDF document text
- http://gs-metals.com/filespath/files/20210916025836.pdfIn PDF document text
- http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/45358083909.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000cf60.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCF60 | 10992 bytes |
SHA-256: dde1070f3df1ec46654804de5622e7159460b192b427c0230f8631b0f7d31027 |
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font_01_sfnt_off0000e87e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE87E | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00010090.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10090 | 17584 bytes |
SHA-256: 0d718252406b88d7c7c1eb8839074179dd3c3d8889ba42f0218c8ff9f2bc067c |
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