Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a60186cc217c164…

MALICIOUS

PDF

54.0 KB Created: 2021-09-07 08:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9e25d7da80a98378840f5a6994306868 SHA-1: 6ef5d477861515ce1b2b8d6c424a5733c274aad7 SHA-256: 9a60186cc217c1644e50ce2230dc6c75bc58b7f38f8d5f3370389bc48c68e8c5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document identified by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, further obscuring its true intent. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4912

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 https://wastran.ru/uplcv?utm_term=blank+map+of+europe+during+ww2+pdf PDF link annotation
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/83680371061.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///48499731415.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f09fbdd66---nedupizexibofazovolaxos.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16090e9e046997---20495387750.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b653dc76b88---43531530134.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/magurubujesafiseken.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160959c8e44a69---57714337815.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/31412635594.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bikozefu.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/1f2277c9ed9735b2314218d8954e91fd/wofajugujolelitiduzavane.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16097c48e263ee---sejuropaxedasoviw.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/95741207729.pdfIn PDF document text
    • http://candientushinko.com/images/file/vokulevozedabu.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/45cd0d12577a1f4f15caf0a093c34319/12986721203.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/68739028692.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/76383586265.pdfIn PDF document text
    • http://unstitchedfootwear.net/files/file/59881201879.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b01595ce37f---nusologetiriporegagawaw.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/10175498744.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/66609190642.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/11060363236.pdfIn PDF document text
    • https://vyaspublicschool.com/ckfinder/userfiles/files/tezexe.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/femiwoxota.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/c410fc58e53823f9f6f9f5700f97129a/3266077952.pdfIn PDF document text

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