Malicious PDF — malware analysis report

Static analysis result for SHA-256 9635413d41426df8…

MALICIOUS

PDF

62.0 KB Created: 2021-09-23 14:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f8624adba9ecc646f814a677a91329aa SHA-1: 49ca2ee8150aa79ceb9bbd1b9a9fba70e89d79c4 SHA-256: 9635413d41426df85060b337de8b1bf0e85931b7c08cac399b38c3da05eb7aaf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be hosted on disposable domains or compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8923

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://crewmak.ru/uplcv?utm_term=como+liberar+un+lg+p500
    • http://kaies.net/upfiles/21090314253896386742mt7f.pdf
    • http://rc-modeller.se/images/file///91495212837.pdf
    • http://maslatalaia.com/userfiles/file/pagazibujalorek.pdf
    • https://lomasdelaweb.com/userfiles/2008.09/file/14618355210.pdf
    • http://gruppocaminiti.it/userfiles/files/47075784272.pdf
    • http://dorapeyzaj.com/userfiles/file/39539907202.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16131f2ec4ff32---94454248014.pdf
    • https://medius.sk/userfiles/file/tasezizixagasaramumej.pdf
    • http://okeefesreef.com/ckfinder/userfiles/files/dogasoja.pdf
    • http://kastely-vacduka.hu/fileok/file/59482443437.pdf
    • https://investincarpathians.eu/app/webroot/media/files/xifobonoton.pdf
    • http://annabarons.com/files/files/gofuniludilagisorusilali.pdf
    • http://atem.sciara.eu/public/upload/file/71744645187.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/501d38f973e2463d8851cd1e1fe0d85d/dusofozuk.pdf
    • https://eastmangroup.org/ckfinder/userfiles/files/ximevitazawibomotisinusa.pdf
    • http://garankuccu.com/upload/fckimagesfile/a0c383a0b0c40b4d972a2c1ea005be04.pdf
    • http://encino.kopanramen.com/uploads/files/wagojanime.pdf
    • http://www.museopizarra.com/ckfinder/userfiles/files/39722555005.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/8b7328134b21edd32e695369931b09fc/3461717050.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/be98725ce078bb8133b2d3a51766482c/4813327024.pdf
    • https://darkoyunpin.com/calisma2/files/uploads/72726163149.pdf
    • https://cmflower-kkc.com/ckfinder/userfiles/files/67837468039.pdf
    • http://yztools.com/images/upload/File/ruxaku.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b616e2a235---68104867196.pdf
    • http://saydersan.com/firma/files/14063579370.pdf

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