Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd4fc6038aaaba7…

MALICIOUS

PDF

47.3 KB Created: 2021-09-09 13:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5e13f1b54b11d29ef4943120a18cf9b8 SHA-1: 4160de920fa3b56e319af0ea7c3d6c5a56fb54fc SHA-256: 5cd4fc6038aaaba79845824048c49cf884b629659f9061c9811b723fea8465ee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users. The PDF's structure and embedded URLs indicate an attempt to lure victims to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6646

Heuristics 5

  • 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 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://medvor.ru/uplcv?utm_term=can+i+connect+my+phone+to+my+wii+to+watch+movies PDF link annotation
    • https://reitinguok.lt/userfiles/file/gopedowus.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/rusewesorewexo.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/38424214795.pdfIn PDF document text
    • http://spyboarcams.com/files/nawarimixusesitotav.pdfIn PDF document text
    • http://rtm-plus.ru/ckfinder/userfiles/files/losunaxelax.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109041346078523.pdfIn PDF document text
    • http://888spirits.com/userfiles/file/28702879085.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/xebogamefe.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/xaxubizakujaveveke.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/87f40d56326cfe66d2bb9fc216be37ae/zolimimofufenemotilon.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/23388603552.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///funupelexamedidofobonozu.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/xigefamivek.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/52283716169.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613870453993b---76307068639.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/nazulowavudenidezedibo.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/tukejajuxumukutop.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1630785804.pdfIn PDF document text
    • http://egitara.com/upfiles/files/57040226128.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d2e8b7450---fakudaxaga.pdfIn PDF document text
    • https://anjingliar.com/contents/files/52354123464.pdfIn PDF document text
    • https://yourdentist.ro/app/webroot/files/userfiles/files/bunokuzonetexug.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/46965502145.pdfIn PDF document text
    • http://runwellconsulting.com/file/file/12502102264.pdfIn PDF document text

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