Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da503ac8395343d…

MALICIOUS

PDF

63.8 KB Created: 2021-09-08 06:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8dcd4397632986eb173ec9f47003517a SHA-1: 46d8e6d3c7aed61244333b2ae4430f2fde2fe4d2 SHA-256: 9da503ac8395343dc314e4cce9231f396df1d1b7a5a7a9363c06b1f5c22defea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely leveraging T1566.001 (Spearphishing Attachment) as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/51cfdd00a1fc828ebc5829b27319c96f/delenila.pdf In PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/263955f0e4035adedd4b17c490fb6499/17624101951.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/450l8c61rqcmkon59vuh43qojm/8078265205.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/16435842484.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/36292043607.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/34004662020.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c5d9d9d84---17958414312.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/24532587503.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/5ulpdtgd2bo5fgcp9e23k9lv94/wezimujulipasovabejatu.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/424609912.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160debc104daee---nebenelemewokazodisa.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/20429840491.pdfIn PDF document text
    • http://finara-v.com/file_media/file_image/file/duweziwinasaviba.pdfIn PDF document text
    • http://hutergroup.de/userfiles/file/padosuwiwavizuzubipawuva.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077abf99fffa---giwoku.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132bb4bd33cf---34642726946.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a5909d149e7---69092025360.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/63207605186.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070685dc3894---jowamumalirozagidep.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/77195178454.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4f37dcc7d---jezasisuzunesadadovawoj.pdfIn PDF document text
    • http://dtjxbpzx.com/filespath/files/20210831211332.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=biomechanical+approach+pdfPDF link annotation

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