MALICIOUS
96
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm for SEO poisoning or malicious redirection. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. The presence of multiple external URIs and link farm heuristics confirms the attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9979
Heuristics 5
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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://sieuthimaytinhcu.vn/upload/files/laxugimuto.pdf In PDF document text
- https://lifeteacher.tw/uploads/files/202109012132523026.pdfIn PDF document text
- https://aspirecambodia-edu.org/userfiles/file/niwiziwogeroxameg.pdfIn PDF document text
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161325fb389314---zanawidufigunabakimazatu.pdfIn PDF document text
- http://esipro.lu/userfiles/file/1384297333.pdfIn PDF document text
- https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/bawupofilij.pdfIn PDF document text
- https://unitedfightalliance.com/ckfinder/userfiles/files/jukigolimagot.pdfIn PDF document text
- http://rld-carbon.com/file/gukidikefexoderajuji.pdfIn PDF document text
- http://nawooelcs.com/upload/userfiles/2021/09/files/210911170927.pdfIn PDF document text
- http://wellgroup.cz/UserFiles/File/razopiwuro.pdfIn PDF document text
- http://verduciautodemolizioni.it/userfiles/file/vofebiga.pdfIn PDF document text
- http://chpcentre.com/files/file/gakebosogamutipekixekoze.pdfIn PDF document text
- http://mindentudor.hu/userfiles/file/gupukajovovatizupoluseso.pdfIn PDF document text
- https://justforjetscatering.com/userfiles/image/files/segisuvomi.pdfIn PDF document text
- https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/650c66a8c68f80c625b22b9d87900b72/guzubusejijowixik.pdfIn PDF document text
- http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/begos.pdfIn PDF document text
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613559f9bc646---wezamijamorarubapoba.pdfIn PDF document text
- http://medeeatour.ro/mm/file/55615687996.pdfIn PDF document text
- http://cattaneoarchitetti.it/userfiles/files/sekatisuwemija.pdfIn PDF document text
- https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/nr1k5fqo2uh9jl6mmu5gju92v5/sijuxego.pdfIn PDF document text
- https://ibshospitals.com/userfiles/file/85411557855.pdfIn PDF document text
- https://highfieldhousehotel.net/nbloom/fckuploads/file/70786332198.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=where+can+i+watch+old+classic+movies+online+for+freePDF 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_off0000f89d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF89D | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off000110b4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x110B4 | 10884 bytes |
SHA-256: 4ada14d04f517377510c6f5b04b25800090f97a0f6c9cddf41855c1b76048152 |
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font_02_sfnt_off000129c4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x129C4 | 17596 bytes |
SHA-256: 0207b63d768be4baf34211eb2153ea08e245333e8e093ab01f591dbac75b2f8d |
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