Malicious PDF — malware analysis report

Static analysis result for SHA-256 696a5467d1c91952…

MALICIOUS

PDF

66.0 KB Created: 2021-09-13 09:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ea10893bfcafbe44c78675b0973e4853 SHA-1: b2bca3786a1ed095fcd77dfc63566524edc1c64a SHA-256: 696a5467d1c919525f513909a196f4ca9a43735c74e93b43f0b08bff4316d7cb
94 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous external URLs, many of which point to compromised websites or disposable domains. The ML classifier strongly indicated maliciousness, and heuristics identified it as a link farm on disposable hosting and pointing to compromised CMS uploads. This suggests the document is intended to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9137

Heuristics 4

  • 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://enjoy.sk/editor_uploads/system/files/fosasaxuzalanokowek.pdf In PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/pusudovuv.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/lowobemurisorikedoji.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/lafosutubesoxanonodudukux.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/2778711885140aa0f1abf8a7eb9730a0/27150340975.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16130cd73ccae8---sulefugapurologafe.pdfIn PDF document text
    • https://heritran.vn/uploads/news_file/48442240230.pdfIn PDF document text
    • http://tiyuchangdi.com/upload_files/files/20210904_213246.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/33186690845.pdfIn PDF document text
    • http://01host.ru/userfiles/files/36027591029.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/kosixixerofe.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/32157483202.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/48731907965.pdfIn PDF document text
    • https://aaaxxion.info/images/file/18863484282.pdfIn PDF document text
    • http://knupress.com/pds/editor/file/vilagizetuzizekavavuvodu.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/jivodolonovisuveno.pdfIn PDF document text
    • http://orzo.cz/uploaded/files/99931591884.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/18002861382.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/bisitukowi.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/47635472082.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/jejowolofemefux.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d31c5f3118---39241393003.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/75018483602.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=qr+code+reader+webPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD518 16780 bytes
SHA-256: 37152de9bfc98cb90d62c99a1f02d25045ef9e2e919a26afdf88ad6bb93e1ee0

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