Malicious PDF — malware analysis report

Static analysis result for SHA-256 361a33d58647be9a…

MALICIOUS

PDF

80.4 KB Created: 2021-09-18 14:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 95174e87464a480d5d9962e6ad776fd8 SHA-1: 987974c91e823efc91728f1003f0e2ed9f3663a4 SHA-256: 361a33d58647be9a24bbd2656cc8a4c7c91131d6e02dcf339b9f1af796adf21e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites and disposable hosting, characteristic of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6920

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 https://alpinebadmintonacademy.com/ckfinder/userfiles/files/32879912060.pdf In PDF document text
    • http://avemkz.internet-match.com/upload/files/mejupilu.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/xazanomozotu.pdfIn PDF document text
    • https://nhomphuongnam.com/upload/files/18990041591.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/lujizojuvexet.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/loranejarewo.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/7bvqn8brq3m125tol7mhkq3v7q/wididumup.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/didosunu.pdfIn PDF document text
    • http://boldogelet.hu/media/nujogowab.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/kowezusejivada.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/zuzobarinulatojisemevi.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/77366959224.pdfIn PDF document text
    • https://strings97.hu/userfiles/file/jimikotarasi.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140480b55dd4---15208012918.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/filajabitanozakedorojeguj.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/ligeduxoweladivigataf.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16133d86474a2c---70058033269.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/jiviwipubuxi.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/gevofenufake.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/jidowelotolavesoxesisose.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/d8ca5c619d48323e8a63ccb69cb32eaf/nugisejo.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/35110564978.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=auto+instagram+followers+increasePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E46 10848 bytes
SHA-256: 48a2815c3acf803b27c4ba7bba7731f20a67fa3742d3a7a1bf691b8a8cd5a336

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