Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0aafa1fe832747…

MALICIOUS

PDF

60.6 KB Created: 2021-07-03 14:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: af668f35129de8f895c6cbe45c4b092d SHA-1: b77ddc2e916552c9cb4bcb5f59f7c5ba918fdf9e SHA-256: 4e0aafa1fe832747839c4da316ec1800a2c36f08b74f701c416a0b7bf33e7763
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of numerous URLs suggests an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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 http://curry-box-deluxe.de/userfiles/file/89732469369.pdf In PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096140606eed---rutadelijutipaxogasuxo.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/6241925532.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/e13addea76afbde0999269b78e29c65e/4261048238.pdfIn PDF document text
    • http://grupophi.es/uploads/files/32307274353.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202106/file/95473044747.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/dazik.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/36529188399.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/39198026839.pdfIn PDF document text
    • http://qytbearing.com/upfile/file/vazosedi.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/jurama.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/nosetaz.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cc41df8515a---xuraxopasisezorafekobarir.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c354e90989---firomufopadogiku.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/tarizonevedawavurisik.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/4a6d912cb75f9f54fe4228229f52c2d9/simoxidigipileworojo.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021671438285508.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/46377507339.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/61679222848.pdfIn PDF document text
    • http://soles2walk.cz/data/file/nomijidulesadipat.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/eebaa6ee3478a4e71e96cd859bc97c68/50876895264.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/93494801289.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0ddc3cc09---40447039853.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/pisosajuro.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9f0d76c09---vatujupopamifejosoguvi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=thermal+analysis+of+polymers+pdfPDF link annotation

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