Malicious PDF — malware analysis report

Static analysis result for SHA-256 472d17b4ea01135a…

MALICIOUS

PDF

62.4 KB Created: 2021-08-21 05:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8b2d531502110e5889426c63cd090749 SHA-1: 2c227e183a8274370f88b98c0a427e3db90fa1f6 SHA-256: 472d17b4ea01135a6c47b5615111d86cd786d6cfe941e6778faf8dc0adde3185
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites used for file hosting. While no scripts were directly extracted, the nature of the link farm suggests it's part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9569

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.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098ee5655c83---41510809171.pdf In PDF document text
    • http://klinok-saintp.ru/files/22129466783.pdfIn PDF document text
    • http://cuakeobinhduong.com/upload/files/65950003757.pdfIn PDF document text
    • http://carbontuning.ru/file/kofovemawitizisefemasad.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/74umns19ok35u9cnhvh9igbtpo/nifabiputoto.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/bedaniwos.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/88294296483.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/93283927014.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160990fbc3c7ce---76980981385.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/71170698122.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/vudo8iemh8iri2uo1voak51ttm/75516916762.pdfIn PDF document text
    • http://cokhilegia.com/upload/files/debinegutemano.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/10269812932.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16081cd4303ed9---fadoxelanefinigewo.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/27869416a68c1f5e3ca54cfc6adea6e1/86214100801.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/kilazilubejum.pdfIn PDF document text
    • https://airshow-bg.com/file/51973103608.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608e499ab2bac---lakevapimovemeli.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/giwaxegetijowasuzere.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/libuku.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcc985402e---71266019933.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/16902896966.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b854783ea5---firusode.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/bcbeefdc15f87a2f0c5c1d45701de983/86067387229.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=what+are+the+different+parts+of+a+catholic+church+calledPDF link annotation

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