Malicious PDF — malware analysis report

Static analysis result for SHA-256 6464483214667715…

MALICIOUS

PDF

43.7 KB Created: 2021-09-25 23:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: d3cb9af082ed36f10d1c3b56e0d48265 SHA-1: 7c4a0256a1916b0c40e753665b73f3f3f1dbaca4 SHA-256: 6464483214667715193d784a92da4760412b33ca8e0135cdd387eac387f59e0a
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links to external websites, several of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The PDF's structure and heuristics indicate it's designed to trick users into clicking these links, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7661

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 43 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://nissanotogovap.com/uploads/images/files/dapusodixuzipadubibabola.pdf In PDF document text
    • http://clingac.es/d/files/fadufow.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/tebipi.pdfIn PDF document text
    • http://tcihk.com/userfiles/65194685246.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/95740184756.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2ca6cb309---bijopawotagoxabadetewed.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/lujobenagasifupoxezipuki.pdfIn PDF document text
    • http://gapp.fr/medias/files/48766249532.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/2662909277.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613441ab4695a---lexinirivowevipuk.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/64271021679.pdfIn PDF document text
    • http://craft-personal.de/userfiles/file/13417706726.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/zigupega.pdfIn PDF document text
    • https://superiorservicesandsolutionsfl.com/nbloom/fckuploads/file/22121856159.pdfIn PDF document text
    • http://hflbdq.com/uploads/file/082011044180.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/logijosoxubemewizo.pdfIn PDF document text
    • http://rudolphi.nu/userfiles/file/56644609831.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614c4836a8445---gimodirux.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/jfqk5lv9bt73k01gkq9mskd2ng/girimaguvexufiwozekeferin.pdfIn PDF document text
    • http://diadiemvui.com/upload/files/zagakudixejetuj.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/16959496401.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=avengers+endgame+123mkvPDF link annotation

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