Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd15b26efbc3fde…

MALICIOUS

PDF

54.3 KB Created: 2021-06-05 03:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d5f36b7d726913c19fd9d5f574fb120 SHA-1: 4596b7e4b1808e3f19bc66979338cb0bc30700f6 SHA-256: 9dd15b26efbc3fdea658f36a527a6b404ff45b021fa2b03a92ed79e0f0ca9d7f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to a 'spherical wooden puzzle solution'. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7300

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://allytemp.ru/uplcv?utm_term=spherical+wooden+puzzle+solution
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085065569f57---komukoritexosirabikiwi.pdf
    • http://aldara-latinoamerica.com/userfiles/file/39959788096.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/tar8scsnrkohm95a8qlp0ia1jn/76727907917.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6a14e7b9c---nonisaverumekoruderaxomaj.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/t0bp6f66ofqiebd1lop5n228b6/66606550531.pdf
    • https://recapress.com/ckfinder/userfiles/files/sulunarogosepeduwapexar.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/26fts9eg1v46bmdqrc6tavkaht/16444608432.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/fe6mdn7i9rhddukm5nmljvt6f5/769963887.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609d469568d12---firanatixeluzabak.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/e53fa639e57cafe3541e5216e327e267/33324644515.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/b76149306437e92eed56b0ec0000b098/siwejitisubusefanif.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/f367ff8564cbd4221ac08598d2143f2e/24502011741.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865ad616e1b---47172052272.pdf
    • http://technocom.pl/editor/file/nudeg.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858faf8d5e7---ruwasidur.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711fa127b46---3286242784.pdf

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