Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6472d4ab6da7817…

MALICIOUS

PDF

81.1 KB Created: 2021-09-06 06:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 559f6c73e5eddfc21e3866393465296f SHA-1: 76291fafb124c34b2e167a64b9773221be499df6 SHA-256: c6472d4ab6da7817369874f9d9655d51e3d6dd10a966cf5775fe1ec4e8359614
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a pattern of using these links for SEO manipulation or to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://krisoc.ru/uplcv?utm_term=procurement+policy+sample+pdf PDF link annotation
    • http://universalgroupautos.com/files/others/kiwifeleravabupinubaw.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7109ed8eb---83167186512.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/tuzironofufokexoje.pdfIn PDF document text
    • http://hnsunnyfood.com/d/files/zabix.pdfIn PDF document text
    • http://rford67613.com/clients/a/a2/a20594cba7d6fe247bc87ef9b80620db/File/nasiwuzivifojugozarud.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/wijogewarenufazekepe.pdfIn PDF document text
    • http://accronline.com/userfiles/file/86770803459.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/768d7fa435d0152bab749a7006614f6f/zatanazitolatisegu.pdfIn PDF document text
    • https://inverpalmas.site/aym_image/files/65558451532.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a15448b83fd---bowatimosidikatejafoxo.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/64972559636.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/51631013961.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/nojetepabuzevuli.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/76fac53a475e487b49d9a4df7847166a/83979100369.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/ac255d2840ea672b97b4c588f3073817/97897503212.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210707125618.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d58e053d60---xaxaxireja.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609438bb40c74---20308259200.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/66933286307.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/78723800333.pdfIn PDF document text
    • http://protok.pro/upload/files/93817276548.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/woluponixarevetojiwipeko.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/7e8n3ld026h5sj1uft8ckfjkre/74350270122.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dda531310ea---15670125599.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7A 16716 bytes
SHA-256: 97f03680ae9d9d78137df16258e0a17cbad4f1b20427651bb7edc8e0bc0ca197
font_01_sfnt_off00010522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10522 10996 bytes
SHA-256: e0c7f389205bb1264cf8fe275850f5a6bee75b6099254b4239ffa8c0aa2c8895
font_02_sfnt_off00011eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.