Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0cf36d1523d11ab…

MALICIOUS

PDF

63.7 KB Created: 2021-08-14 00:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c7304646f8e2afe516f2cacd13dea7d3 SHA-1: 84333e95e616745dcc492231a649fbcc22feb486 SHA-256: d0cf36d1523d11ab75fbb79bb262e0e001d0013afe4f5a4b21f2439eb85283fd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms on potentially compromised CMS uploads indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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://laborke.ru/uplcv?utm_term=can+you+see+deleted+whatsapp+chats PDF link annotation
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095db5fd0d75---wexuxubiguluvibexeka.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/468a3ea2d0a81615ffee7e68fbe479b4/6923764419.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/kukego.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/46091712750.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/30297208370.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/buridagajepigivo.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/lmbnjum4akbn9m75g1slp3ual4/podefajuje.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/10030799752.pdfIn PDF document text
    • https://a5productions.com/home/a5pro/public_html/ckfinder/userfiles/files/lodojew.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/h22rvgcl904gk5m7qpf1iqm9h2/jerememofaguvez.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/mr3p99jvp9rqvk08j1p9ifibdf/26765390904.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/80670246715.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/dafasofefobipexubevegu.pdfIn PDF document text
    • http://ruilong-ironwork.com/CKEdit/upload/files/87103562086.pdfIn PDF document text
    • http://qachs88.com/clients/58271/File/sosifaz.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/9266833605.pdfIn PDF document text
    • http://kdekdyjak.cz/data/newedulelulemasel.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/dotopidosinujemoxu.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608788a3e61ae---vuvinifiwovapekixute.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a6e2e9435---95112688307.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/wutezekegusezudapunopogo.pdfIn PDF document text
    • http://jhdljz.com/userfiles/file/1626958829.pdfIn PDF document text

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