Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9935c02d8bd740…

MALICIOUS

PDF

42.4 KB Created: 2021-06-13 00:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 39261b20ebf92676d3c8ac0639dc6568 SHA-1: 6ae25049e268a090cc4c531418910a8d2d78d473 SHA-256: 7f9935c02d8bd740d7c0460283100ed17a0fce5e28fc4ccd15306dddddd4035f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress sites and other disposable hosting, likely to distribute malware or facilitate phishing. The embedded URLs, such as 'https://archism.ru/uplcv?utm_term=key+driver+booster+7.4', suggest a lure related to software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8113

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://archism.ru/uplcv?utm_term=key+driver+booster+7.4 PDF link annotation
    • http://orsolyajuhasz.com/ckfinder/userfiles/files/josezimitebekufep.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728c82deff2---kapujofuj.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bc5a49759---32716124989.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed1c1f3ed0---11540326249.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b13994f0365---juzifinuvazexedolegisada.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d28148202---52440694010.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/tamulakuvekitodenibera.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/uhbojr9799h2kol9s1eqjcuo23/zutawolumami.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/vibowonerupokujaxiboburaw.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/67f14fd16c360f089f188cf40dcacaa1/dupibuzovejibabuzumodanom.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704871a5694---kawufogotat.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/fb7bb3239c4527b9468d2343835c2f34/xabediwikegoxofazilewa.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/e93jp7ack9od48i1mkej2u6cq2/10032192943.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/disorifexiwebis.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/87011557501.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/59cfe7e8d42f11e587f81f8706c3af2d/zejogimavenegelozen.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075aa5a3b4a7---57404983197.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc87be8d09---39947424428.pdfIn PDF document text

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