PDF malware analysis — malicious · ebcf461f6dd95d5e

MALICIOUS

PDF

80.3 KB Created: 2021-10-05 13:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: ec1ffdabe074453a2297709eaba7ef29 SHA-1: 9493c14060284cb379991ad5c9deab9cf4389162 SHA-256: ebcf461f6dd95d5ef3f0bb44047c470da5af728a1a04953f1429abf70547d2f1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF 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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small 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.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The 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.
Embedded URL info EMBEDDED_URL

One 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://inwebjor.ru/uplcv?utm_term=how+to+get+wither+skulls+in+minecraft PDF link annotation
- http://gradn.ru/uploades/fckeditorfile/zaveferilodagonag.pdfIn PDF document text
- http://asirakademi.com/resimler/files/39307620335.pdfIn PDF document text
- http://baocaosudanang24h.com/uploads/image/files/76466428724.pdfIn PDF document text
- https://milliondollardesiclub.com/upload_files/featured/files/tusevupafef.pdfIn PDF document text
- http://heaig.org/editor/ckfinder/userfiles/files/17322141553.pdfIn PDF document text
- https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161542b1e90af5---12822742727.pdfIn PDF document text
- https://living-stone.lu/userfiles/files/17433644989.pdfIn PDF document text
- https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615802ff5c780---kexokuwagabusi.pdfIn PDF document text
- https://ofcourselc.com/admin/uploadsfile/xasesana.pdfIn PDF document text
- https://pirkitpadangas.lt/ckfinder/userfiles/files/6117804712.pdfIn PDF document text
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161450021e38a4---sasexibijevopekipe.pdfIn PDF document text
- https://dodatkireklamowe.pl/web/uploads/files/kotuvamelaxasega.pdfIn PDF document text
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16137b00db9f0e---xomapulomurekanefemevitif.pdfIn PDF document text
- http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/lupurapapebetidese.pdfIn PDF document text
- http://apcmagon.com/userfiles/6037760267.pdfIn PDF document text
- https://siltri.com/fck_upload/file/woriletenuxu.pdfIn PDF document text
- https://kibledergisi.net/resimler/files/zudutotujuz.pdfIn PDF document text
- http://cainghienbinhduong.com/uploads/userfiles/file/vedijuvobodukis.pdfIn PDF document text
- http://tsrmmessina.it/userfiles/files/wazoneketomuwitazitosala.pdfIn PDF document text
- http://wo-kop.pl/userfiles/file/23068612316.pdfIn PDF document text
- https://shiprapublication.com/uniformkontakt/userfiles/image/files/80870093690.pdfIn PDF document text
- http://ngoinvest.com/uploads/ckfinder/files/lagolu.pdfIn PDF document text
- http://www.superior-inkjet.com/login/ckfinder/userfiles/files/nutuzeripewusidaxux.pdfIn PDF document text
- https://dewalt-naradi.cz/media/upload/editor/file/pogozijudogosopibi.pdfIn PDF document text
- https://cargotavio.ru/files/file/kefiwozaver.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_off0000d313.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD313	11052 bytes
SHA-256: `bdaed6d08956c0868927117c749503d4471006e391f2ebf8e4140e89925aa526`
`font_01_sfnt_off0000ecae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECAE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000104c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104C0	18384 bytes
SHA-256: `197c7fb66a95a4fcaf20af2b35967b2b4b0abdf47b583482ba8755c67b341dfe`

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