Malicious PDF — malware analysis report

Static analysis result for SHA-256 f598ac6549bbe18d…

MALICIOUS

PDF

41.5 KB Created: 2021-09-02 14:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 24ce1f1734dbc13668b61a7199378646 SHA-1: 09275d6dbfcf109c4af61270e89fa7ff56e3ca55 SHA-256: f598ac6549bbe18df68611ff9253afeb0a93c806e82f059b11465fe06a081340
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. It contains a single image and minimal text, typical of a screenshot designed to hide clickable links. The numerous embedded URLs, many pointing to compromised WordPress sites, suggest an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7341

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 41 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://coretry.ru/uplcv?utm_term=amhara+region+zones+and+woredas+pdf PDF link annotation
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608551d94fd6d---81954060554.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16076bc12239c0---jobukunofebo.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfed86b156a---57800645866.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087742704fe8---4177958669.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/jegezaxozeradu.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e085db3fb7---pidimu.pdfIn PDF document text
    • https://protrialse.eu/files/files/53274901551.pdfIn PDF document text
    • http://ohstigers66.com/clients/d/da/da15611725e7ba20b6827cbf2e24f87d/File/57369981399.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/ed0f091113c8e589e7b7e1ed8ecb0c0a/30452112746.pdfIn PDF document text
    • http://bydnjl.com/userfiles/files/53938821842.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/40317355648.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/3ed1fbb5d308426fa577a7117b5396da/31224259214.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/75674025271.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/redader.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/96620205341.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/5afc200b10922e0cfa0cdd53209b1e09/56940879978.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/mopofajamofifagenob.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/variparapavulazidifajepik.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d28b217988---vowixaluvuvokovifetit.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/0er0e7k7t13kohtt3mm1ja0ek0/nebesazijilawevu.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/1qe8sh2qvt83f971otmft20ou5/dewinanadomafe.pdfIn PDF document text
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/99337580916.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/19b350f5695a5ac28b2289bd38d3aeec/peluxoxobaru.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/221bfbe04312915685e84258146929af/furunotudikuraxumebekero.pdfIn PDF document text

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