MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. The primary attack pattern observed is the use of a link farm to redirect users, potentially as part of a spearphishing campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9982
Heuristics 6
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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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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 http://wmc21.com/ckupload/files/26447194660.pdf In PDF document text
- http://thunderstar.cn/userfiles/file/20210906205017889678413.pdfIn PDF document text
- http://artemon.nl/userfiles/file/wozinuj.pdfIn PDF document text
- http://wx-bm.cn/upload/ckimg/files/202109101556208525.pdfIn PDF document text
- http://www.deewanalarab.com/up_imgs/vesovanibu.pdfIn PDF document text
- http://mbfeed.vn/upload/files/bupizupapugitogadozukig.pdfIn PDF document text
- https://alamansyria.com/userfiles/file/19934193467.pdfIn PDF document text
- https://newsale.linyn.mobi/upload/ckeditor/pages/files/befivefidu.pdfIn PDF document text
- http://hzeiger.com/userfiles/file/52050394874.pdfIn PDF document text
- http://tcihk.com/userfiles/80004377907.pdfIn PDF document text
- https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed864e0ee8---50583829256.pdfIn PDF document text
- https://viboot.traigiongthuha.com/ckfinder/userfiles/files/60998102401.pdfIn PDF document text
- http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea578c2440---58551863565.pdfIn PDF document text
- http://pagyesa.org/userfiles/file/20210912204559.pdfIn PDF document text
- http://madurastones.com/userfiles/file/nularaxofotadugiwo.pdfIn PDF document text
- http://www.predia.cz/userfiles/file/dopixobifosuwokesojij.pdfIn PDF document text
- http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614b3745760a3---38411043155.pdfIn PDF document text
- http://abwcolley.com/uploads/files/mapefibemetujilupatodozi.pdfIn PDF document text
- http://siddharpeedam.org/userfiles/file/In PDF document text
- https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/70804967805.pdfIn PDF document text
- http://www.donboscovizag.org/images/files/kiruwopimebikadigukizok.pdfIn PDF document text
- http://lobanowscy.pl/userfiles/file/76391490163.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=planescape+torment+iosPDF 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_off0000b1cc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB1CC | 10536 bytes |
SHA-256: 8eed7d0d8d204a84c60fba2c747fdc6140b72ec1fde804374a216d4f1da2d540 |
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font_01_sfnt_off0000c9c7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC9C7 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0000e1d9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE1D9 | 17488 bytes |
SHA-256: 7b2113816b5f9ece62fba199f04b40185d2284418184f7e3ec6fbb8d1107fc07 |
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