MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
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 https://infrive.ru/uplcv?utm_term=how+to+change+ringback+tone+on+android PDF link annotation
- http://itaxabc.com/userfiles/file/20210905055126_243025399.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131fa2ab6096---28725577419.pdfIn PDF document text
- http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/6916248566.pdfIn PDF document text
- https://bursakaynak.com/userfiles/file/jojazatan.pdfIn PDF document text
- http://www.mustwalge.ee/data/content/files/zekamumipimujuzijodafepo.pdfIn PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/d429i0q76t2v7849b5r2dhfiq5/wikuxalab.pdfIn PDF document text
- https://jocafoto.com/fotos/file/60118438983.pdfIn PDF document text
- https://ymy-tea.tw/upload/files/moxuwiselipigu.pdfIn PDF document text
- https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/28875f05a8db69b2810073371ef1ffce/zukakuwajamikenimuw.pdfIn PDF document text
- http://cathugo.de/res/wysiwyg/file/gakonadevaguxoj.pdfIn PDF document text
- https://energooptima.hu/upload/File/18220690726.pdfIn PDF document text
- http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/kipirizuwukotolixakapisow.pdfIn PDF document text
- https://adurucui.com/ckfinder/files/teror.pdfIn PDF document text
- http://kokocurry.gm/userfiles/file/86904912828.pdfIn PDF document text
- http://kulturazebrak.cz/userfiles/34485254134.pdfIn PDF document text
- http://pc580.cn/upload_fck/file/2021-9-1/20210901110259432120.pdfIn PDF document text
- http://chekeeh.ir/basefile/chekeehir/files/ditibunabimonimokeno.pdfIn PDF document text
- http://terwaarde.be/ckfinder/userfiles/files/segamakilaliduwix.pdfIn PDF document text
- http://chalappuram.com/userfiles/file/kizalupowaxasisuxiba.pdfIn PDF document text
- http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161404cabab31f---jurusetoposimafejagimi.pdfIn PDF document text
- http://e-park.es/img/uploads/files/35052116927.pdfIn PDF document text
- http://urparitet.ru/admin/ckfinder/userfiles/files/bubox.pdfIn PDF document text
- http://jinshi66.com/uploadfiles/files/39085929586.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_off0000e537.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE537 | 18348 bytes |
SHA-256: 84f0be72d5afc26997a166df4def322e48fbc35521e19829255b132cf8af199d |
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font_01_sfnt_off0001146a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1146A | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00012c81.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12C81 | 10744 bytes |
SHA-256: 7db99de3891868590c60c9c05604950dd00552a041d5cd02f82af8f3d597616a |
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