Malicious PDF — malware analysis report

Static analysis result for SHA-256 1805f62eab9ca483…

MALICIOUS

PDF

66.4 KB Created: 2021-07-08 08:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 24d8d1c6470b6ac2c9dcbc50bb3e42c1 SHA-1: eb842f162225d6918b06d836da598301b54c046f SHA-256: 1805f62eab9ca4838e725992d307e171b3fc3c74efdaad5d2153f0cf2ea957ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised WordPress sites and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the primary evidence comes from the URL analysis and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7042

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 http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee5abda724---suletida.pdf In PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609262f2d8f76---sejaneku.pdfIn PDF document text
    • http://china-miyaco.com/img/file/202161182334.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/20487516263.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/23675786247.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/2285732636.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609d894bb61a5---17162806013.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/fc8e0b9758654ed257661847f3f089e2/waketigoditaxepom.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094547ed08bc---wujukasudupawiwetuvagu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cd6535160---fajovusiratuneteneweni.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607daf4f4d8d6---kivolegagebanepipuviw.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/b622cf49eb6071d08521873a5d197837/danadux.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d5d6a57f5d1---17916358072.pdfIn PDF document text
    • http://mega.kz/media/upload/files/gefutitod.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/jokanolajonutipuwuxanogar.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/turulupoponikewa.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/6077938231.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/8cf07063d5ba1927826a5a167a093393/rozozotijaluzamuvisida.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/varuligeme.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823097ecc9f.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=causes+and+effects+of+the+market+revolutionPDF link annotation

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