Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b8229a869b0fc3…

MALICIOUS

PDF

47.0 KB Created: 2021-07-31 12:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: c6bbac8d414b2a2cf0acf0c3158c6ee1 SHA-1: 994addaa5ed81bdccd8d4f4487a795b66f3e113e SHA-256: 05b8229a869b0fc39450bfb7580b09207ff4d8e50dcb737d6625494a98c93e88
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS upload storage. The primary purpose appears to be to distribute malicious content or conduct phishing attacks through these numerous URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7205

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://inwebjor.ru/uplcv?utm_term=cracking+the+code+of+life+worksheet+answers PDF link annotation
    • https://synersys.fr/contenu/file/tusadojarup.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-7-30/20210730132006859375.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/xuzotatesilirugigav.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/17476219349.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/14247921425.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/lufigegifazovujebaxa.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15ab59beb6---92549388172.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/03rtskcgds25nm7tov9ot7mfj0/wereliborufetulujafal.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/goporuzazewurafevawa.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/wirof.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/dbd4ed9f55f01b9740d5bf7e88ef9c67/73332029158.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/md2qncdln3b0kggh7jm8hdt7c7/dumoweponuzotovuvumosav.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/42074565667.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/savijoziduzizanetux.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d60473122f---sukosatejileporiwalabixej.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/1cd618b4c988c545d9fc5549000a84c9/baravudibokaxib.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8fc3dbd97---norasagopeminepipep.pdfIn PDF document text

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