Malicious PDF — malware analysis report

Static analysis result for SHA-256 523e206e93f4521b…

MALICIOUS

PDF

50.3 KB Created: 2021-05-26 11:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 08f3852d5cd6274beddf7d080ff181e4 SHA-1: 6ac76b5d40745ed42c4cd7c618ae649118785769 SHA-256: 523e206e93f4521bf6d1fe8acb146703f67cddc7284c4adc22f59d35cc4bb8c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious files. The document body, though heavily obfuscated, appears to be a lure for a free PDF download, likely leading to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7515

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.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e77813207---rivutixasajal.pdf In PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/3hhtu70gtfv8mvqa3fcs678v01/69708904078.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098caa448f09---1808681029.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/vodumokiwesididefija.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e548ad983f---nifumovuro.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/dbf60961d38d09a99ca35e069e56230c/58842453521.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086b5a8063f4---sodoxewiximowufowob.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607e65bce18e1---xevelozujanitimavogititu.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/rupelogulinifemegaxuvegu.pdfIn PDF document text
    • https://menu2uplus.com/images/file/fukanola.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160741edaea137---55141152208.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160860e565a924---1376020793.pdfIn PDF document text
    • http://amandamaitland.com/images/file/1878190525.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a69da202bb8---tabakikexenobiwudesufu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=the+body+keeps+the+score+free+pdf+downloadPDF link annotation

Related samples 8

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