Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b575987d4f6b58…

MALICIOUS

PDF

47.6 KB Created: 2021-07-20 01:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 932eb3a625052364d892c05f3de1f990 SHA-1: fb31f02db6f384acdf179e95e66c18598bf4d5fe SHA-256: f5b575987d4f6b586cd16ad47189e7baef154dfd1e8058adc020e24c0c994fda
154 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9202

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://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/eb63697caeed6c37871bd879d657ffe8/puxigovuwaf.pdf In PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6ada1a267---ridexadusomuloso.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/03469d6d4ad23a8f8ea32c154a91731e/47282597927.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2695341489---37151295264.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/jomoke.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/zuruxofulas.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/b1aa8577eae61665132d38f759d7b43c/38844517039.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/joxirelewuger.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/2d844f86ded1de6fc655c0db386b57d9/gudel.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/lebavajowikazezob.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/35287805671.pdfIn PDF document text
    • https://www.carrentchiengmai.com/files/wufutube.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a8d6832d4---19619588900.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/16463137806.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6f224c78b---wuwatipotapixixegapimagur.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/81027243704.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/ldv4c15bjfvdsjbb8jv7ds3ngn/nofozepuzaki.pdfIn PDF document text
    • https://aokman-drive.com/d/files/lojazezekewimujenoz.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/f45fa8aac75806d2e399186e512355fe/tofoxiradoderafuviwik.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/22042340713.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/73737536376.pdfIn PDF document text
    • http://gillyard-johnson-mahoney.com/clients/62114/File/ribimefikaxidisezedojadus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=tan+equals+sin+over+cosPDF link annotation

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