Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff92acca040f45d…

MALICIOUS

PDF

53.5 KB Created: 2021-09-16 07:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0116a777a31b9bf19be29dd0a56e8f04 SHA-1: 1e5086e321727a60f0b86bfa0b1ed8e842226d63 SHA-256: fff92acca040f45dbab7fdc96a3747ce0a10a8ef45a8d5ba3b99c24ca4042c4a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external URIs, many of which are hosted on disposable domains and utilize UTM parameters, suggesting a link farm designed to obscure the true destination or to track user interactions. The presence of these links and the heuristic indicating a link farm strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6486

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crewmak.ru/uplcv?utm_term=angry+birds+star+wars+mod+apk
    • https://hainutedecopii.eu/ckfinder/userfiles/files/47643849886.pdf
    • http://mybyblos.com/userfiles/file/41962483562.pdf
    • https://designclarf.it/file/figogosobisiziwazexonew.pdf
    • https://tyko.pl/userfiles/file/99243801063.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/e935e0737f8515496fa30f3274494da3/56519266588.pdf
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/kinubebo.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139970241bbc---tonabemagotovopivisinixek.pdf
    • http://autoscuolemontagna.it/userfiles/files/89912684573.pdf
    • http://varosom.hu/userfiles/files/waxolovomububodarudikos.pdf
    • http://urparitet.ru/admin/ckfinder/userfiles/files/zarefametoxuk.pdf
    • https://aahs.givingplan.net/sites/default/files/editor/file/zalilotesujisuji.pdf
    • http://cartopack.be/Images/file/43271816913.pdf
    • https://tlproduct.com/userfiles/file/gijatuxuxukemubes.pdf
    • http://tuzvedo.hu/elemek/file/46242574441.pdf
    • https://hinodecoder.com/userfiles/file/nugutixelokunukafami.pdf
    • http://tupnate.com/ckfinder/userfiles/files/pisiwu.pdf
    • https://doctornhospital.com/banglanews24/editorsfiles/files/88235694105.pdf
    • https://powerliteaac.com/userfiles/file/18884540797.pdf
    • http://kleinschaden-expert.com/userfiles/file/20648851348.pdf
    • http://www.dereformasenalicante.com/archivos/files/33393546177.pdf
    • http://blueview.nl/app/webroot/files/userfiles/files/jetilozejonawa.pdf
    • http://lobanowscy.pl/userfiles/file/85620473651.pdf
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/ruwiwumawabufu.pdf
    • http://uniquehotelsolutions.com/files/others/xeruwivelerivesaxi.pdf

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