Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fd7b579638f326…

MALICIOUS

PDF

53.8 KB Created: 2021-06-10 21:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5582d9d9385b276b85197a8ffe7888bf SHA-1: fd8d30c562487eac4c02b17f346baeb66c5829ad SHA-256: e7fd7b579638f32688201b34948f8b966b2337eb7cde11ed6064cde116ca2a05
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier indicate malicious intent, likely to redirect users to malicious content or download further payloads. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6983

Heuristics 5

  • 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.
  • 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://laborke.ru/uplcv?utm_term=how+many+sides+does+a+regular+polygon+have+if+each+of+interior+angle+is+165
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/cn3eursnsesnggc2g8vntl4ev2/jigid.pdf
    • http://aptchasers.com/FCKeditor/userfiles/file/89144136806.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a71b88f77---5916803410.pdf
    • https://harrisitalia.it/uploads/file/xedufekuwavuv.pdf
    • http://familiehollander.nl/images/uploadedimages/file/rulisu.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/ee013dec2fe374ad043efe9cf6c76386/26667309981.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/ab3936a5e7eb61e8bb3200878d99a7c9/nulorufuzakanezezop.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/ls3kff65r06u6mv5g4si59lb4o/45913945626.pdf
    • http://biomassasia.net/data_ed/userfiles/file/89087089424.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/2aa982ea7c23c9d8501855e665a82357/dodesoxotivinadalapopib.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856229f0323---nenupefasodoxiragi.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ekid246r0446etvmafp25efoht/fixalomowudenenuxed.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160af918867c28---xosipu.pdf
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/1a34e3e2f0927d450eb51ceeec330015/24102505356.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/tlqckhn6h3ds3r5l0crkkb2no8/zemuv.pdf
    • https://roweryelectra.pl/app/webroot/uploads/file/16216039794265.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8729c3d67d---penonepabos.pdf
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/kuvugiv.pdf

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