Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d4820a0dd0911f…

MALICIOUS

PDF

55.7 KB Created: 2021-05-15 21:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5dd8b3f569e8b835da3a4ba47ff8d0e0 SHA-1: 6f5321048ade77ee6b1dd7786f2e89cd5640177f SHA-256: 98d4820a0dd0911f4f8676f4b2cff2bc3bd103a4e7f86dd5e4d2730680e1e2b0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. The document body, though corrupted, suggests a lure related to 'caller name talker software free'. Numerous URLs embedded within the PDF point to compromised WordPress sites, likely serving as landing pages or download sources for malicious payloads. The presence of external URI heuristics and link farm patterns further supports a malicious intent to redirect users to untrusted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7497

Heuristics 5

  • 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
  • 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://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/deeeod7kk9pbbfhj0akbvm56pr/47010393310.pdf In PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/9u1c4buu306ue4r1k5javc96a3/gekafevakogok.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/rnvo1qj84gfglkmv230nbg50qc/supibebodilema.pdfIn PDF document text
    • https://aspirans.com/files/file/99123717868.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/f9b9071fd94200ff79e5a9a58d4681b7/vadikebesodi.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/30256358906.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097f914da664---81208718875.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c74f11f9ae---motasuwipuzurobasunon.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/ba5ea1321faaaba1e0ed822983cab802/29908290096.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608affd3cd240---figudogejujemefogote.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ca211e001---38935696877.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/b211c24790b8f17bbf5a55c9897a43c1/dilorugepesunivubozoweguj.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609497168ee3f---91570810202.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/zosomozipavanijuto.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/d6da599bd885d44a83eb1f9c75759cd4/63720862139.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8c535e8e2---pafulegigupujetag.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/33138488676.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b488cdb3fd---wisetadalowojexibupabixub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=caller+name+talker+software+freePDF link annotation

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