Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02ea3e27db0b02d…

MALICIOUS

PDF

85.9 KB Created: 2021-06-27 00:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: c7dcb77712c56ad0bd26bc5fcef19f03 SHA-1: 5a80bf0012bef406764a06cff54e3d524916764e SHA-256: d02ea3e27db0b02da68e48b5684e855c8f3ca0d289e05e8dccdad01d416c1960
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6865

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://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075bd3cebbcd---waxafuzebiwojasuma.pdf In PDF document text
    • http://restorationteleconference.com/clients/73716/File/setez.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/95827541531.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/ff70be845176fff38c0ea5f9e5eae871/16978950711.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0d6822cb8---57207258802.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/pekukowegegebikadopolise.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/1854148626.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16098bd80bcdc0---lugememajil.pdfIn PDF document text
    • http://hiddenforrest.net/clients/76790/File/rifiputetibuk.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/5739657836.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/bodufakoxuxebusumodo.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/19a9lq772raijl2sf0s70mum6e/26466396161.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16071907090ddd---29862622609.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/f949dcc7e1661267ed3b62eac4879508/7322392875.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844cc14da96---zusajituzakizif.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/cdd2f5d6d320217d9093d1539d6b1dab/47368352624.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/99742160747.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/706a74ee27d7da14639ec4d3eb57e2f4/pekovadigedokunevoriki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=dry+mouth+after+drinking+waterPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A8 17528 bytes
SHA-256: 42a6fe87afe24cf3a1438130427b76df7dc428151d01a25a3637daa9e6330078
font_01_sfnt_off00013f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F4F 10980 bytes
SHA-256: db238b599240fe4e98b959bf33662b971b4bbddebd62ba0fe9351ee6c5291b12

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