Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f313b1547302f58…

MALICIOUS

PDF

46.9 KB Created: 2021-10-07 04:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f9d6193035175a3204d88122e840a917 SHA-1: e4d4511dc6f2d67c01615dd00c9f372edd110586 SHA-256: 4f313b1547302f5893cfa6fb44cf00df338796cb46ddae486f4c69110690c188
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting. The ClamAV heuristic identifies it as a phishing trojan, suggesting a malicious intent to lure users to potentially harmful content. The file's structure and URL distribution indicate it functions as a link farm designed to distribute malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4607

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://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/tuzavadi.pdf In PDF document text
    • https://villadorottya.hu/uploads/frontend/files/dedusodatulorapakomafosi.pdfIn PDF document text
    • http://www.globalnautique.nl/upload/files/lufadude.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/95322628710.pdfIn PDF document text
    • http://lonsdale.ee/tipikas/uploads/sisupildid/vofebogenivegurinutad.pdfIn PDF document text
    • http://vietdubai.com/userfiles/file/jakorifewisafotaki.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210930204927.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/34491542384.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/putesozituvosa.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/48805491099.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/liwagikuvebolizasatubuxi.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1615bb4754152c---tukofafexane.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/9621934990.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/161507d400fc75---22518393887.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/94766473567.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/titavutakibo.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/baxazurelomopad.pdfIn PDF document text
    • https://rtaadmin.mrv-educationservices.com/content_file/files/nedadixarobuzurut.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/tugodanolurowanebomarek.pdfIn PDF document text
    • http://storemisr.com/uploads/files/64079965505.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c85bfd2a94---73991695700.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/33425290558.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/wetamuleduworefimunaduwo.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/rimikixog.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/63626811655.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/volozomotu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=vulva+itchy+and+rawPDF link annotation

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