Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6d077245a84e56…

MALICIOUS

PDF

56.5 KB Created: 2021-09-20 11:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8cf9231504403ee688ff6a8204eb7786 SHA-1: 1df7ba667f55fbf124b7f6938d3fac5c3fcfd64a SHA-256: 5a6d077245a84e566c83e9190f84e776ad712f64eac80d428e9d2fcdfcd62200
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' and ML classifier further support malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's used to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5305

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://laborke.ru/uplcv?utm_term=blood+meridian+pdf PDF link annotation
    • http://concilianavarra.com/userfiles/files/fivoxadosunuli.pdfIn PDF document text
    • http://wx-test.com/upload/ckimg/files/202109180318007764.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/63664491765.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/vonufetekiwebeluvato.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/wigemujemirejolukaf.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/wuradudam.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/67900272872.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/nnse6ca6q3lrmeiakpafqqn4gh/tuvotidubomidorudesabopu.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/vutexumoxob.pdfIn PDF document text
    • http://captainkillmite.com/uploads/files/202109090025108129.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/fapeporoso.pdfIn PDF document text
    • https://mhreng.com/userfiles/file/godiwipofele.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/2i5t4241p0tqdrigfutqqbsdlv/83005630200.pdfIn PDF document text
    • http://shriramashramssschool.org/userfiles/file/garum.pdfIn PDF document text
    • http://thegioioto.store/upload/files/69371876572.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16145f8fa73cd2---95728954717.pdfIn PDF document text
    • http://okudshava.ru/userfiles/file/zurexivofogebik.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/rupefivazanozaxifixebower.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/67536854209.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142f01583770---lujozoxinudumojamawovi.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/5205600559.pdfIn PDF document text
    • http://schokozentrale.de/idata/13678062114.pdfIn PDF document text
    • http://js-space.de/userfiles/file/balav.pdfIn PDF document text

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