Malicious PDF — malware analysis report

Static analysis result for SHA-256 32be66fef07bfeb6…

MALICIOUS

PDF

53.9 KB Created: 2021-09-22 11:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 789d38157bd872a06bba110decc3cc9c SHA-1: e91c76a222c0620732f5c24541f0343a3bb3c91e SHA-256: 32be66fef07bfeb62990eb84fa32c13ed5511c14225d0f66c83d1f3a0ba06004
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest an attempt to manipulate search results or host malicious content, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7318

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://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/kozezelivejowenowabi.pdf In PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210909_19507A4E5252C85B.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/lawibip.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/sutonovegade.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2e4621949---jumobuzote.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/68990258695.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/ratumewudomamub.pdfIn PDF document text
    • http://flashdisplay.net/UploadFiles/FCKeditor/20210917120827.pdfIn PDF document text
    • http://risme.vn/files/pupoduler.pdfIn PDF document text
    • http://vrakskodamnetice.cz/file/zupuzotulomaragokenu.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/13650522962.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/nikivajazigagu.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/sawiwafesujetagopesirane.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/701ed9a8e26d8e47452749ce05fbf934/99661203750.pdfIn PDF document text
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/fibutizorir.pdfIn PDF document text
    • https://kattliv.com/kattliv/admin/userfiles/file/89289433800.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/64e08c16cdd6b643cee2aafc426630fa/diwokuvufodaxiwo.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/vqc3vvvs0u7bq6en7nlstap6g2/79145570162.pdfIn PDF document text
    • http://integrotech.eu/zdjecia/file/83433570830.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=properties+of+exponents+algebra+2PDF link annotation
    • http://zs.tom.ru/jsplugins/ckfinder/userfiles/files/1125915552.pdfIn PDF document text

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