Malicious PDF — malware analysis report

Static analysis result for SHA-256 26922347c70ac5da…

MALICIOUS

PDF

55.9 KB Created: 2021-09-13 22:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 43d8ebf0e526a51a4721966de8f23092 SHA-1: cd9dd983819ba7aa4de32217619efce8e2c5e16e SHA-256: 26922347c70ac5dacfb3bffdecd6d9a3a98322e25e2048221268b5533393d458
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to compromised WordPress sites. These links appear to be part of a link farm designed to redirect users to download further malicious content, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The presence of JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d01fdad4d2---44376616365.pdf In PDF document text
    • https://fivetc.vn/uploads/files/69391547825.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/sozinofosiba.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/81339207554.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/20091180430.pdfIn PDF document text
    • http://phuongsen.com/img-chamthi/files/73261297897.pdfIn PDF document text
    • https://autopits-directo.migrupoq.com/ckfinder/userfiles/files/polasiwikowewivu.pdfIn PDF document text
    • http://lapmaymn.samdigroup.vn/app/webroot/upload/files/35926336809.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/kaapsqu8uqm6e322pl6lk01pi5/pemokopisarapenotukudu.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/pututavadutemexafaregef.pdfIn PDF document text
    • http://guitarenko.fr/img/files/kajowaxosiwiwilel.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139610138855---18085767818.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/japarulexegigefomi.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/hpkk4baroror3rgnd0mbeej0ga/29154974245.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd03e17ed6---55624351140.pdfIn PDF document text
    • http://charivne.info/images/file/45493866446.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/laluzobegosi.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/97953951531.pdfIn PDF document text
    • http://accronline.com/userfiles/file/nifofudorimaxemexos.pdfIn PDF document text
    • https://organicearthfiji.com/documents/file/463755457.pdfIn PDF document text
    • http://sireny.net/share/files/92516549537.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/95983151394.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/wosise.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/mirisuwofawasepevukikikad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=capcut+app+download+for+pcPDF link annotation

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