Malicious PDF — malware analysis report

Static analysis result for SHA-256 e81b1ed0ea93247d…

MALICIOUS

PDF

54.4 KB Created: 2021-09-13 11:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7341c6c907b94798f94946cdf44ad912 SHA-1: e46b9a3d7d1c90afce86c471f45ed71a5616cae5 SHA-256: e81b1ed0ea93247d28efcebdd61edd9cba7924f91334302757e828bc6375ea3d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5515

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://interference.ajoda.eu/userfiles/files/11309771736.pdf In PDF document text
    • https://usgcambodia.com/userfiles/file/89681667233.pdfIn PDF document text
    • http://katela.net/userData/board/file/70651593231.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/ledusegaxajuvilamu.pdfIn PDF document text
    • https://okna-kursk.ru/page_edit/_samples/userfiles/files/mupoda.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/liwenebejatogib.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/23805728964.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/27366906926.pdfIn PDF document text
    • https://digireg.es/upload/pepise.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/91bck5h1vkreaecbh79gst3un6/69550462176.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/eddf1dfd6ca03a7ce6f95b1262aa36dd/gebojipuworuvu.pdfIn PDF document text
    • https://biocoils.com/img/file/47005752812.pdfIn PDF document text
    • http://trongtinpc.com/luutru/files/44509706007.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19850252932.pdfIn PDF document text
    • http://baoveantam.org/upload/files/nimugexufavuto.pdfIn PDF document text
    • http://hcstonetw.com/uploads/files/202109030145579495.pdfIn PDF document text
    • https://svltv.in/userfiles/files/birupuje.pdfIn PDF document text
    • http://ecole.ru/text/images/file/20890419473.pdfIn PDF document text
    • http://koala-al.com/d/files/58267207630.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393e4a0bfe7---79246788996.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/gaxawojokefonogopogup.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/xiputebejofi.pdfIn PDF document text
    • https://www.pu-sk.com/app/templates/js/ckfinder/userfiles/files/fojufe.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/25955585222.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/puzogurodinasatofitileseb.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/60758506543.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=monopoly+latest+version+apkPDF link annotation

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