Malicious PDF — malware analysis report

Static analysis result for SHA-256 986c9f5a6ee23e47…

MALICIOUS

PDF

65.1 KB Created: 2021-09-04 20:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 83f43b25f3aacb0af514be40ed2a3048 SHA-1: e8f86d428c887035a92b771590733a7e45651743 SHA-256: 986c9f5a6ee23e4733d2feb68c6fe7112e0369d32bcda3ca90e49924f83471d5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm on disposable hosting further supports this, aiming to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6241

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://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/2a36011c4b5b34ae2801b2102e91db31/nasufufosemef.pdf In PDF document text
    • http://forglass.sk/userfiles/file/69052453788.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/4246vc1iueupdb2f106a46iuo7/nudererapaxejowukozaj.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/46650432878.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa2abb660b---defoguxojejifunexidanabex.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/falelotupumolafodezi.pdfIn PDF document text
    • https://cargotavio.ru/files/file/7512780341.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/84934833947.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/telemabemokuxowizepifelut.pdfIn PDF document text
    • http://dalaichau.com/files/pigudumubogav.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/xetiverevo.pdfIn PDF document text
    • https://hkfew.org.hk/ckfinder/userfiles/files/99042785167.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2d8572604---27135950256.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/ruruwewozizawamerefen.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/39558297182.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb3d40e47d---70847443437.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b90eca4261---61221994973.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/57552424031.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/be1be19466cdee58bf4107c2eb3a2bad/mirimarewajulu.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a520071749a---1696775322.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/15832334969.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/lakojuwoferesenu.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/6653668776.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=big+data+walter+sosa+escudero+pdfPDF link annotation

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