Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb50e05b17157dda…

MALICIOUS

PDF

371.0 KB Created: 2021-07-03 06:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 57c171d851e6880bd283f0001e58c2cc SHA-1: 5cb9b41f8179972798cb4cedb9476a74cc0a3b8d SHA-256: fb50e05b17157dda4f1ec5b58dc16c6cdfaf376cc14d9fe2894e619e01ea28d0
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload directories, indicating an attempt to host malicious files. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of multiple links to potentially malicious PDFs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7429

Heuristics 3

  • 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.
  • 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://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/7503689ad414f1a7ee0b2371cf333245/14298743382.pdf In PDF document text
    • http://zkpower.net/upload/files/83091190442.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/mogimig.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b22e49c6055---97187684612.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/96650101654.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/20984579898.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c0982ace7b5---kifezawefunutodugosiza.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cddf3f320c---sagokuxesovel.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dc2c3b1e0---40386889291.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/1ab34193f4b984a9427380e88ec42daa/xutujavap.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/lusoku.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/d8593b7ffe73966f7f536b50a9178ba9/17267287176.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16082e787cc22c---70055914661.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec8c5cac7f---86747711839.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/83875048274.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/dadumiluxenuramoxatime.pdfIn PDF document text
    • https://susta.vn/userfiles/file/34934342983.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/cfadbf9fd572df9166dcad82f04bcabb/gekofakoriwutiboxewukal.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/54659880291.pdfIn PDF document text
    • http://sunnysidehighschoolclassof59.com/clients/867562/File/risotironojomup.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/34580159028.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/d4a1906918a4126ffd9668c1a6b73b92/notobojegi.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/58420489670.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=spring+boot+documentationPDF 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_off00058dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58DC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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