Malicious PDF — malware analysis report

Static analysis result for SHA-256 954c4e9fed97fe75…

MALICIOUS

PDF

39.6 KB Created: 2021-05-22 21:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d163a6d6a59ecf60dd105e322fdabef5 SHA-1: 6228d4f50a4cb93d12cb78cfb430ccf849d3d5ae SHA-256: 954c4e9fed97fe7545e40ba555b22802ce082f7cfec67a692e15a17f30e0921a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The document is image-heavy with minimal text, suggesting it's designed to obscure a clickable element that redirects to external URLs. Many of these URLs point to compromised WordPress sites or disposable hosting, indicating a link farm used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9758

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 https://proektasis.gr/admin/spaw2/uploads/files/rowagaguvimijiwujetu.pdf In PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/901e2fc05cff0222455b3b28b7ad5eae/jewozina.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/d37fd4fa64dbdd3ed07d01eba6327eba/wufekebutigepuvuwuzozeruj.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file/%5C/nejesotopogonowusezijexul.pdfIn PDF document text
    • https://brickbodysupplements.com/newerac2c/userfiles/file/14963246687.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/xomuzizajugero.pdfIn PDF document text
    • http://worldwidefilipinoalliance.com/uploadedFiles/files/vosumetozugatorakowudewo.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/e5f6d18c21fcc51a034c620fc52a4827/30870627800.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/01273d1d05f91c4b17bd3aba5af35ed5/depikuxugegedazu.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609306773d7aa---47398798782.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c74ed81c97---xexikupasawijijezudag.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/cd2ccb159e8a150f9f508ace75aa7197/zivigevunele.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35b589f19e---56522039809.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce5524b110---86288365173.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/91871ddb5eff4daeb96c05a90d01658c/rivowaviwigerunuxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=libros+sobre+dise%25C3%25B1o+grafico+pdfPDF link annotation

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