Malicious PDF — malware analysis report

Static analysis result for SHA-256 718e3b6a428a0b7e…

MALICIOUS

PDF

63.7 KB Created: 2021-07-14 05:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a8eebb4a76eb7365b7b93fe9839b9527 SHA-1: b7f49e06412a80b1bf5cba24e5c2eec6fa3bab66 SHA-256: 718e3b6a428a0b7e1001569edb76f475dd6299783f2184480ffbf18e8933ab20
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links pointing to compromised WordPress upload directories, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery via these compromised sites. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5714

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://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a5e4b658f---77520966213.pdf In PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/vijofumibovakuterojiza.pdfIn PDF document text
    • http://flambotour.it/themes/userfiles//files/xetokukirav.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/41c316a1c9aea2cbcd6594e95435ebf9/65610646265.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/f9uilh89lmp0dgfq809bmul5i1/14294194463.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/rmmo10umf308jq5s5iauman7b3/relur.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/hd6bk5oq8qsit0ojgbrdcin51u/19863785258.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074350200b35---xezab.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/fizexekakomibabipevofan.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/vonasedesilomex.pdfIn PDF document text
    • https://cutandcolorparrucchieri.it/file/rurewikav.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/15137667760.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160952cf8cdfc1---kokarodivonekak.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/xawodegoxojeg.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/b4e41fbb6958c0fd1fa6c2a4fa65c599/37933452562.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/sofevisumobapigad.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160775dcf28ecb---ximebep.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/12933460137.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608af9144a250---29821798442.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074375bc62b4---fimusosinolateso.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/81074922178.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/81956632465.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088473077628---72203283450.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077c8f89dd8f---ronopatej.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af76b294cb---1755367835.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=national+orchid+gardenPDF link annotation

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