Malicious PDF — malware analysis report

Static analysis result for SHA-256 50dab1fb23a83811…

MALICIOUS

PDF

62.4 KB Created: 2021-07-20 18:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7898f72551e8523850af33649ea07d7e SHA-1: a5bd41836818385b1e6c9937b03974a96a79bd2b SHA-256: 50dab1fb23a83811f1ab79607e7c186e19e6159b796afb5a311a8dd1549d667a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, directing users to multiple external URLs hosted on compromised CMS uploads and disposable domains. The document body is heavily obfuscated and unreadable, suggesting it is designed to conceal its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6855

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://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/5d3977d1df4eb89d4df2200354ed1332/xovalosubefatus.pdf In PDF document text
    • http://iworking.vn/uploads/files/2516421463.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/xisisixuniwak.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da68baead7a---zegakesaveb.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/6bf989b46389b8e8af8694c700411db8/xotolarumizap.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/cc3df48fbaa0ea938c392803f3c32287/63267825057.pdfIn PDF document text
    • http://jpmoto.biz/upload_picture/97102064148.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/liwekijimawuv.pdfIn PDF document text
    • http://cooleywestbrook.com/clients/865832/File/mewezudirejoxijet.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/9b2bf19bc9d97989b396e224af77e184/34831093518.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad0ebc4c78---furexonanikititeti.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/a8jmm1qtj7g4b303jb5j0dot6n/bibefokizuv.pdfIn PDF document text
    • https://actor-conseil.com/files/file/68192380987.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/pjvh978apgpf01tevrbfqc7rqi/nemexanirexixune.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/85828979938.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/85e2f3ef9e266dde346fed8ac0750c0d/71473868515.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/cd3846eccdf8a6454614338172a80d20/16467525080.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/17506774459.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/46105999786.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/46632280940.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fcd13e608---71040601423.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=partition+magic+recoveryPDF link annotation

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