Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f464e67a6944f76…

MALICIOUS

PDF

75.5 KB Created: 2021-10-06 13:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ec79844f95a6e3ad0b7acefa54101371 SHA-1: 577b8aa7a27306d85afbbcb05a78d89554400730 SHA-256: 9f464e67a6944f766fe5c97119ed1123e81219aba04e02f5487e0ce0ba0e9599
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to facilitate malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7028

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://okazionche.com/files/bikakobepokijaxitolifugom.pdf In PDF document text
    • http://offerparts.com/upload/files/jitalu.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/kirog.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/pabiwor.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615096710a031---77586931633.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/zofetokajeverojobepupi.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1614b98c4cfe50---72262571788.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/79414435799.pdfIn PDF document text
    • http://tamtamphat.com/upload/files/mijamomozikevukolefoxorum.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/gujetak.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/86440453344.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/sexadonutadipago.pdfIn PDF document text
    • http://fijiembajak.com/uploads/ck_uploads/files/kurigelavadizujawuj.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/katawiv.pdfIn PDF document text
    • https://domilot.com/uploader/files/82599667121.pdfIn PDF document text
    • http://ciskmv.com/css/file/vedabifajolinazikera.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/85419601448.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/dotugifegix.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/83315883296.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/11711513411.pdfIn PDF document text
    • http://gro-felix.si/uploads/9268003519.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/161506b614a071---tatozuraluru.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/13775528017.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/sokawanuvunuzal.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/jidajaxopamitoviv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=reply+to+a+second+interview+invitationPDF link annotation

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