Malicious PDF — malware analysis report

Static analysis result for SHA-256 2089efef2f0b3d3e…

MALICIOUS

PDF

39.6 KB Created: 2021-07-14 10:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 7115f14ef10843a522b8f443f2fa2e68 SHA-1: 91130ea77ea5a38a3b79d88e17cbdead039df5b6 SHA-256: 2089efef2f0b3d3ed82f50656e67aa982c5ef614a661c2c2650a217b655a76e2
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 0.8883

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 39 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 http://www.yoko-ono.be/images/userfiles/file/loxoforagexulunabap.pdf In PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3053b4863---kiwal.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///27461697845.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/563f2d8d075dd8392a51ac005556f168/36606778034.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f38729561f---58909536569.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a1136240e---satalilometi.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d59c1cc81---zapofe.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/regafixanirixulitogewidi.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210603015151.pdfIn PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/23901107208.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/39263660510.pdfIn PDF document text
    • https://adikkedua.com/contents//files/mixibulotapufosu.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/44171062306.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8f772ea50---bafafe.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072252ff2dbb---venoras.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/ven2ok6tftcj3jn22a9bctv7js/tadunuzisono.pdfIn PDF document text
    • https://agsposure.org/wp-content/In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=ffx+earth+eaterPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/gerimulujiduge.pdfIn PDF document text

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