MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to other PDF files hosted on compromised websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting an attempt to manipulate search engine results or lure victims to malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9955
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://quatden.vn/webroot/img/files/67021173864.pdf In PDF document text
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1e3488c28---pobemeporox.pdfIn PDF document text
- http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a525c649ae---4719330205.pdfIn PDF document text
- https://cubic.is/userfiles/file/38155678005.pdfIn PDF document text
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072e36c11993---16784369581.pdfIn PDF document text
- http://thicongdiennuocmiennam.com/uploads/files/bukurazukiruvoso.pdfIn PDF document text
- http://artdealer.vn/upload/fckimagesfile/a315938ac5575449ca51e5ddf5951561.pdfIn PDF document text
- http://servmed.net/userfiles/file/fofilojuviguv.pdfIn PDF document text
- https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8e349a8a2---lejitatapatumasawima.pdfIn PDF document text
- http://jamesandsons.ca/userfiles/file/64665266059.pdfIn PDF document text
- http://abogadosaguilar.com/ckfinder/userfiles/files/93263248556.pdfIn PDF document text
- https://wfca-czech.cz/temp/userfiles/files/bameperi.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb729498a5---73055870235.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612698288876b---20270313208.pdfIn PDF document text
- http://dobermanncz.eu/files/24754814134.pdfIn PDF document text
- https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/adaed3ed25941486f13939f7e650cf37/bolaga.pdfIn PDF document text
- https://terminal.hr/userfiles/file/dimemixefun.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c81231cfa---gufidaxonufer.pdfIn PDF document text
- http://m2m2design.com/userfiles/dubewav.pdfIn PDF document text
- https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/laregil5e8lkabfrbr9u99jh8s/5521890233.pdfIn PDF document text
- http://lesen-und-schenken.de/userfiles/files/10931408650.pdfIn PDF document text
- http://massintech.ru/img/outer/files/28043610029.pdfIn PDF document text
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/533937eed827c7f480cb47cf5dd9e4c9/43078439530.pdfIn PDF document text
- https://webornate.com/viking1/uploads/files/41563491054.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=recitation+poem+for+jr+kg+pdfPDF link annotation
- 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_off0000dcd5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDCD5 | 11016 bytes |
SHA-256: 66abecf61a115deb1b6e251be05be72a2f8dd7c47f2d776bdae11bf09abbc742 |
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font_01_sfnt_off0000f62f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF62F | 17796 bytes |
SHA-256: 867d64becf2691450f1b45fe47365045aa669e342329a157de78dff00b30f1b2 |
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font_02_sfnt_off000123e1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x123E1 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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