Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ddbba756d08cdb…

MALICIOUS

PDF

62.4 KB Created: 2021-09-04 20:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9ae10b92c4fba2a47d8e4a9c7fb3c4af SHA-1: 26d3309ac47b5c3139ccfd89805d50bee6f119f6 SHA-256: f4ddbba756d08cdbe68b60dcc8c647e60a427c983a50aeabf7010b33ed02182d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further support its malicious nature. While no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6040

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 http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca5bd6c0c---rejojamilupefit.pdf In PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160881c75b3a1f---18796648472.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/jti8lsphtdpgs9s8if4v97jiie/68251858415.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/nudaduxopesapiw.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/7b9a6f23c08cf0aba2a2cf53fed851f0/73705432478.pdfIn PDF document text
    • https://triosms.com/userfiles/file/272738430.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2d1c0e9e6b---bapevufugobedarosig.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/a99cpd91j9rqlm35d8oltg0g41/94094401621.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/98344373034.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/10659303957.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/vowujuboritawetedexufawep.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/2274086231.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/33648780451.pdfIn PDF document text
    • https://tavio.ru/files/file/nitemopus.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/a38546d78676d63affbb9e352ae691d9/16011685923.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/kimofurutesosamimulajiki.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/5c3728dac0f45ff51b94cadf261ef118/50249269533.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/gaxukizulasepadojutonuwuj.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/rexusulimixedodoko.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210627041447_mew4jm.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/86761223404.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/fc642eb9111cfe06a3bad3c75389197a/bujabagidaganemifi.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d87f856f0---luguragederunarutabixowek.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/65a1d9a563061003c54476e10b1a9df0/20017327263.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=adobe+acrobat+9+pro+extended-pdf+reader.editor.creatorPDF link annotation

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