Malicious PDF — malware analysis report

Static analysis result for SHA-256 3220d0ca88f2246e…

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 01:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b67908fdf64df98eb421e2415a2cc8b9 SHA-1: 8f0ccd61b168758c5b41446ced266a86aac8127a SHA-256: 3220d0ca88f2246e776fcf9b553ee5b515f1e0bce7756dc817ef45784a348128
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. The presence of PDF_URI and EMBEDDED_URL heuristics indicates the file's primary function is to direct users to external content, likely malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5559

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://rigdrilling.org/userfiles/file/betomarawokanujapofax.pdf In PDF document text
    • https://tort-art.ru/userfiles/file/71237750107.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/9a883d5ea95f1d8bf31e8923746a2296/79836213410.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/jegoxazumokekomuduxit.pdfIn PDF document text
    • https://thietbigas.net/media/files/besowil.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58959857451.pdfIn PDF document text
    • http://steinemann-ag.ru/40679304235.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/wukakemaw.pdfIn PDF document text
    • http://medical-1669.com/userfiles/files/35493655047.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612faf7aadbdd---rawabuju.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/7050234930.pdfIn PDF document text
    • http://pjcwyy.com/upload/file/buziliguwirujogemufubobox.pdfIn PDF document text
    • http://casms.org/atts/news-files/file/25287835103.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/zugobanujejejirunifo.pdfIn PDF document text
    • https://siemreaptraveltours.com/userfiles/file/nakogezugo.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/38425310665.pdfIn PDF document text
    • https://hoangphatdanang.xetnghiemadndanang.com/uploads/image/files/futijakawidoke.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/g8l026dplt39aep0qvdufpkrat/99705212791.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/dikamumepaviveweretegese.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/23377722572.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/tebalipuvajumu.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/70265409588.pdfIn PDF document text
    • http://i-tos.com/userData/board/file/wuzudirazedabixaxik.pdfIn PDF document text
    • https://benmoonpharma.com/userfiles/file/wixevuwevawevobapabor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=dark+deception+mobile+apk+downloadPDF 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_off00011498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11498 10828 bytes
SHA-256: 11f281a9441c4f8663bef223ade7d0b5278d507f35cfd1c27d63b832049c5544

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