Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee731d0ece8042a6…

MALICIOUS

PDF

82.5 KB Created: 2021-09-05 07:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 85609ce6ea236fa1849d260ee7a7e0b9 SHA-1: 79d15e82b8223622c5f14dca971bcb4a299a546f SHA-256: ee731d0ece8042a6f9d0723ac626f320e90a89da3af9d384b9e34d3aeff471fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6387

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://krisoc.ru/uplcv?utm_term=oracle+database+11g+sql+fundamentals+1+volume+2+pdf PDF link annotation
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2fefb61007b69b6a509b2db8af44c82d/nokajitejixuzogikibidiwo.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2b3b08526---76222669752.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/o9of5lkhfn0b989522de7lc230/pavufukupafaj.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084012518380---48515966726.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/vozelekuxizepawe.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160be78c935745---tajonobigoto.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/betovagotewelobexifa.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/vopvgi2ua55lpndtvlgfl6esno/dexalubazuzomu.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f429f9c0857---59154069456.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/subef.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cec4292df9b---vanutafexejelob.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e98d507453---82357440262.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/tawezodazapunubimibif.pdfIn PDF document text
    • https://mmeasar.com/mmeasarfiles/file/piteruwopavumibefeluweja.pdfIn PDF document text
    • https://chp-travel.ir/data/file/7409808682.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/vezutinuzojorisapija.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ad95b76616---47074739140.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afc99d82072---vofoxizewobawoxereweles.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/e18e3ecfad84da03d2059cbc9f159798/sifilaferekexijinejoveki.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/a64e0bc977413607aa148ffd0d431b8a/69928938923.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/dubejobowededisizapiw.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/kozaxigegisedozorawosavev.pdfIn PDF document text

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