Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e4957e1cd9e383…

MALICIOUS

PDF

66.9 KB Created: 2021-07-25 08:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 924c452f65e2996260cc934d75651653 SHA-1: 826de8dd38f29373de59a5799e46b17cf67b94de SHA-256: 31e4957e1cd9e383c0f93a14a3f721b417ef58416cdd4ac95a6adedef70d94ab
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6381

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 http://a2itsolutions.com/chop/multimedia/userfiles/file/nobarodaxurulamavizor.pdf In PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/gavosozosumowademilefor.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/d1626ab1a94d967ecbc80ab8edfd8ad6/80530641994.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/fawexiralikelisolizu.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/buwidibubapagevilabejoxo.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09be353cec---nudim.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/mewukisinibor.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/nujodokufo.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d98e7d1e89---83806885185.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/vatutazofetatamex.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/51526423275.pdfIn PDF document text
    • http://lroundup.com/clients/d/d7/d7466da0ad72d96b64793f89c518a0d9/File/83919188659.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/13757348794.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/23296101947.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/mixegej.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/6pf80e8obqciv3q1dpd34mr3m7/zimusalotetak.pdfIn PDF document text
    • http://brmc.jp/user_data/userfiles/files/jezozoxareg.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/2721082089.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cba6831dcdd---kitojukosovepekoromupef.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/26697871259.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607720a942b61---11349150229.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/23097284284.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/e2900iegcnkamk8ueskol4htki/sutuxozavule.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/72875495489.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=automating+the+boring+stuff+pdfPDF link annotation

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