Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5a94d49f91f2fa…

MALICIOUS

PDF

64.0 KB Created: 2021-07-02 21:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc2e0eb579e5b2509632772a0c48490c SHA-1: 6c54aa67163bd8c873aef352a51651be507ec73d SHA-256: 0a5a94d49f91f2fa7fde98bc8669f6f3aae095e7719e9e828663f149bd028cfb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5245

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://cructi.ru/uplcv?utm_term=a4+paper+width+and+height
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/5c1ba2b8d59b9d9f13143257d84767d4/46466995597.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a846632f676---konafasudu.pdf
    • http://gandolfiarchitetti.com/userfiles/files/mifafujugixisaj.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b91f6d7a29---99595138749.pdf
    • http://www.allatpatikapecs.hu/images/file/12390353326.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1b36c2144---jotekixadesijuf.pdf
    • http://botosani.ro/img/uploads/file/kejexozebupeveladekuj.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/bbb9c1b58c8daba173fc25cdf6fe1265/zupojiluserisove.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccae8627af---bivebugilijitulurugoro.pdf
    • http://ha-sine.com/d/files/tobuponugupuji.pdf
    • http://ever0036.com/assets/uploads/ckedit/files/20210609175320.pdf
    • https://emauto.lv/index/images/up/file/defexenunuweze.pdf
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/boxije.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67136504b7---ranar.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/831956b7c47ddc36f835b98eb93fdaa7/2538927192.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070885b7f637---zotubelesisaz.pdf
    • http://greenhousehotel.vn/uploads/image/files/31978260802.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8efc7e16c0---denunevo.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ce645520a---27569005354.pdf
    • http://adaviestransportltd.com/userfiles/file/levoladafuga.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf16ce8bb3---gufikofakabomomofilelibu.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb08214755---zudedazesojasoliru.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/3otr3k59smlchd36n1v30cts3g/82309624316.pdf

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