Malicious PDF — malware analysis report

Static analysis result for SHA-256 783e2237246f53b2…

MALICIOUS

PDF

73.5 KB Created: 2021-07-17 02:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8b185482288b2c6a16d8349e4737b7ca SHA-1: 6e9402208711ec0600e9ca583f25cefa5a825e2a SHA-256: 783e2237246f53b2883e8f49a7f39174d4fbef014c9b74ed5b08125c22a32024
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a phishing lure or a downloader for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7449

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://hoitruyengiaocodocvietnam.com/uploads/image/files/denepineteditu.pdf In PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e051f94e5bf---memaniverepumelepiru.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/58978850278.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/9cdd802648997b99dc40595dbaa80701/vafiko.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/2e69be33d3e76af26bee040d90fcdca7/taxozijinubino.pdfIn PDF document text
    • http://cloverdiamond.com/file/14009581480.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/bozenemajoxuk.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/43201062555.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607729fae54d5---lekusewewakarenuzadasuwev.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/difikiburodenirugefaviv.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4d93313731---musov.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/25609156826.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607199d0a475b---73247467881.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/69778194145.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/fikodipipabosimopevusi.pdfIn PDF document text
    • http://abnicum.com/files/file/30101201387.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/94750941648.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/76497717180.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cea4a82eb7---xusijukida.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ltoog39sij6pb26k0o14u0bjq1/womako.pdfIn PDF document text
    • https://elitediesel.com.br/ckeditor/ckfinder/userfiles/files/mumuwase.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/a270d48e5602f70e08e1cf7990f92fae/11809178431.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=reflection+about+self+conceptPDF link annotation

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