Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda139ba7efdb273…

MALICIOUS

PDF

95.9 KB Created: 2021-09-15 23:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1dc77ddb3cfa89c4e42e5a241ba30073 SHA-1: f747f87392f25534290e184a51e0990e73da9b44 SHA-256: cda139ba7efdb2739b63e3890e69007d68de892e0bc54a34a13e273a6d1c7586
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the links and the 'Phishing.Trojan' detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5809

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://dentistturkey.com/image/files/korekukumonukeb.pdf In PDF document text
    • https://petrovsky14.ru/docs/files/ditawolosevipuzeserov.pdfIn PDF document text
    • http://muszempilla.com/files/file/78004462492.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/jozotisivaf.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/187739756.pdfIn PDF document text
    • http://ebus.cn/up_file/file/latulikaxidaban.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/6368934657.pdfIn PDF document text
    • http://tainghe.vn/userfiles/file/12605045053.pdfIn PDF document text
    • http://canvangdientu.com/images/file/fovasamojuzan.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/nusujan.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/pudubijivemorusigudogedox.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/16871232043.pdfIn PDF document text
    • https://datajournonepal.org/files/9185130814.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/990d87ea369985ee4792c245dd68adf1/dexuzizaze.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/48058490430.pdfIn PDF document text
    • http://cutskytools.com/d/files/80046773306.pdfIn PDF document text
    • http://ottuk-e.org/userData/board/file/judebironiku.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/6229713417.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/18442194176.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/73510776350.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/bodusiwiwe.pdfIn PDF document text
    • https://esofagopisa.it/userfiles/file/92069326917.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/23765739658.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613615c602f27---930292343.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=mechanical+vibrations+rao+6th+edition+pdf+solution+manualPDF link annotation

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