Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9cace58cbf81eb…

MALICIOUS

PDF

50.5 KB Created: 2021-09-12 11:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1cd22c1e7cc3bb0a6062df313adabd1d SHA-1: f4cba6c9ac8a6011d7fe180c79a6d3d03b0d61ab SHA-256: dd9cace58cbf81eb5ff15f6783c1d06d4dceb89781e278f6c6f8cbcc4ddedf91
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to host a large number of links on disposable domains, likely for phishing or malware distribution. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8963

Heuristics 4

  • 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://ourlady-schools2.com/userfiles/files/6223584836.pdf In PDF document text
    • https://upaspor.com/resimler/files/segekawavunukul.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307aa374076---15854053133.pdfIn PDF document text
    • http://carszana.com/image/upload/File/18086975795.pdfIn PDF document text
    • https://stichtingech.org/ckfinder/userfiles/files/56746992422.pdfIn PDF document text
    • https://momentous-inst.com/uploads/image/files/75345555481.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/fevil.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/bezogixu.pdfIn PDF document text
    • http://metallpress.ru/files/46319927341.pdfIn PDF document text
    • http://quimis.net/js/ckfinder/userfiles/files/tuvugovidivuze.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/99956320361.pdfIn PDF document text
    • https://deycaterers.com/ckfinder/userfiles/files/37030095720.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-6/20210906010519819474.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/090146597836.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/53810968202.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/79064861947.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/88595185714.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/93517702768.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/22140010997.pdfIn PDF document text
    • http://surtek.biz/image/files/20150327_093009.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/dbd1ae8642ee6e6ce15466cd190eeab0/lojofavogulamerovejobaxid.pdfIn PDF document text
    • http://x-mobio.com/upload/files/86200642691.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/41944516888.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/vemif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=avatar+extended+edition+streamingPDF link annotation

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