Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4ec8f757325434…

MALICIOUS

PDF

47.6 KB Created: 2021-09-28 08:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 813b63c59d7c15a31482ac1d17017525 SHA-1: b3d50c52c7f6db47e8c4eea9c2e855a69ec70492 SHA-256: 4b4ec8f757325434a645151dd1dba9653490ff83af09d5f5caf9b6de3317c619
170 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, which is a common technique for executing malicious actions. The JavaScript likely redirects the user to various external URLs, as indicated by the numerous suspicious links found within the document. These URLs are hosted on compromised WordPress sites and disposable domains, suggesting an attempt to distribute phishing content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5960

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 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.
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=xiaomi+redmi+note+3+android+10 PDF link annotation
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136bec06dd4c---72009130863.pdfIn PDF document text
    • https://cargotavio.ru/files/file/biximabe.pdfIn PDF document text
    • http://quimis.org/js/ckfinder/userfiles/files/63612495135.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/2170697787.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/vebus.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/pofoxinor.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/11859552028.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/xokavonuxoten.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/55066754634.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/zubevavaza.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/beganapuraf.pdfIn PDF document text
    • https://foundationkuzmanov.com/files/kufefudofebigeminubu.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/jugavafokegonutis.pdfIn PDF document text
    • https://foursservices.com/nbloom/fckuploads/file/50601365969.pdfIn PDF document text
    • http://esistore.lu/userfiles/file/49221779676.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/matibupafavibanetuz.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210920103132.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/fopewipupuluxojoni.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/2351f21e8b66806d1bc864ea0c3facda/nivaserezezinikulak.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/54356179960.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/91281356921.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/92057138212.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/zutadelizajozetev.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/oo7j8cdvo7q4bhpi3gqe14683a/xaluse.pdfIn PDF document text
    • http://pradakshinam.com/fck_uploads/file/refebujurejojinubef.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/botewubuxovafim.pdfIn PDF document text
    • https://iohrp.org/f_files/files/dovesexituroniwolewekamu.pdfIn PDF document text

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