Malicious PDF — malware analysis report

Static analysis result for SHA-256 90fcb4ee8e0852fe…

MALICIOUS

PDF

77.8 KB Created: 2021-06-11 22:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cabad3d426bb149f8aeb4bfce6cf35ea SHA-1: 25317361d67b482a8d4dd2565ae85aa72bbfac5e SHA-256: 90fcb4ee8e0852fe76159047f6ec91591d63c8d6b1ec7990ae7473c3e6aca683
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by ML classification and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a specific search query in the document body further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://wastran.ru/uplcv?utm_term=brahma+purana+in+kannada+pdf PDF link annotation
    • http://monkey-do.net/userfiles/file/12500403356.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16080e07aceb2e---80931594562.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/46874334104.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/gudixoli.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b346bef7d---10153572020.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/wojiliwuvapofididofigon.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/mbmq227b0vfth3hqrdhng3utqr/burevisodozemixumogekakev.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/jobiga.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/nirokafisonefuzer.pdfIn PDF document text
    • http://614move.com/clients/4890/File/wakuduxa.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31f709924c---71862996731.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/zujoluduzoretetodirove.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/5a4c65d2190cb9027721f444e72734b3/sukenuxeburunoginizafum.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/bufixolisone.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab80ec6323d---61744938489.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/095f33a2574ca4d3bf5d8b11f3f2e585/xatuvanujafojedagosonam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9A 5184 bytes
SHA-256: 58378ab929f536bc93a24a44617d90a8fbf160ea546db326455df21939c8c5a9
font_01_sfnt_off0000fe12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE12 13444 bytes
SHA-256: c95b58d5d7c5592ce5f0daa930e35b5bb5a1415458c42380decee620674e7544

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