Malicious PDF — malware analysis report

Static analysis result for SHA-256 c11d1f3b19cfd9af…

MALICIOUS

PDF

51.6 KB Created: 2021-09-22 10:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aae6f9f3b0595beaafe60dd9c56d0d7f SHA-1: 318bff36c40c2e2742c434e04d2ddd849f181408 SHA-256: c11d1f3b19cfd9af297cc8289e8047c73f4f4bd658c4b16216eae2671372614a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7557

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://timandlor.com/userfiles/file/96321420081.pdf In PDF document text
    • http://playoz.com/ckfinder/userfiles/files/94119666827.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/nuvasowuwumobisad.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/kavubolemu.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/1279455043.pdfIn PDF document text
    • http://laserinnsbruck.com/static/zaxakaxarukewubiki.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/85521764051.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/wuwejarekivomojonaru.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/75764380717.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/wugavefasiju.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/rixakojutulixakubikiwupox.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/pinagun.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/66329650116.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/deviretuxafumupu.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142dca4a06e6---futibosevegaso.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/66380192047.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130286eeb58b---61718413705.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/6981a1bfbb33cc1d42f84236c723c8b5/25019767474.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/15090540691.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/91254297028.pdfIn PDF document text
    • http://philipsphotographystudio.com/wezuselivuzejepamurifu.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/48541390930.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/tixixofelik.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/81475519755.pdfIn PDF document text
    • https://toocapen.com/files/14637706786.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=best+mario+flash+gamesPDF link annotation

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