Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ea6b11bf6d302f…

MALICIOUS

PDF

40.7 KB Created: 2021-07-24 03:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: d9cb96986217e07fa13e7d17504ea2e4 SHA-1: c0764050491818dd286726ebaf5eac51d96fce3e SHA-256: a6ea6b11bf6d302fb0d369468da6cf1a2cf9797997370fc8231d65465612d9a6
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9455

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/bgufi52pgl9m3q5read9p9pfuo/72687368815.pdf In PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccd104174b---jiraterutagoxa.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/fd3ea73e20e2944c9a1c42850eb43702/48760971376.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/zewaw.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/a7e1ef08360489b3a35bd6851fc445d1/4756275577.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082611acca2c---panupipivimoro.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ce58acc6e43---79870193589.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/beganafomuv.pdfIn PDF document text
    • http://www.vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/78242016145.pdfIn PDF document text
    • http://darec.sk/files/files/30644495065.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/fa71b24d3ab2fc5ec1d63c4cdb894772/lejedewewubutejetab.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/95d83b54aab39e03fe9c837fc7194ed3/66857693453.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/gora6b1nmee1mggp29nvuecld5/gobevaramifakekiro.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609855c2dc42a---wisorubirovujoli.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/71826192947.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/b4eb4c1a43e9547a7adfe8a65fb36998/68202172645.pdfIn PDF document text
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/rutubob.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/dodapovugiwigiruzamunaga.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/fukiwizisaxu.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f12e27c0e---nibezaj.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/rubiduwemexiwenosi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=underworld+awakening+tamil+dubbed+movie+download+in+tamilyogiPDF link annotation

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