Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2f57c15682ea3c…

MALICIOUS

PDF

83.2 KB Created: 2021-09-02 19:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c5f771e1fb37cfc7aba4d17e61e6f603 SHA-1: 1ac68ce0d515830d79014b6724e96f8792fe80a4 SHA-256: cd2f57c15682ea3cbd6d77e4a177ada6ffdae52e1f04551c393efcf3e30402c3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.3253

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://cesiedizioni.com/userfiles/file/livijirawubemikome.pdf In PDF document text
    • http://oilspecchem.com/files/fikodedebejesobo.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/2e10b2df11ea98254ef88fe08aa2b541/32788218290.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/27233219582.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b09eadab19---24407613530.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/7cb86b4496c88553778de13b05b1d47b/35776442142.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/matisedetuwovavupegido.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/14241255390.pdfIn PDF document text
    • http://4bx.pl/public/file/82215741786.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/datugiwom.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098619d1ad9c---foganefaxitilomukagana.pdfIn PDF document text
    • http://fruitsad.pl/images/file/15684556083.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/75946733218.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/k9cc140rqq1vs9qgj6qreg6j7j/donopibulerigetepoko.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/j6c92ojeje9cou7eg07pioc4b4/75387193130.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/bazumunobane.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/72634739075.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xuxubugaluxewiwuk.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083daf535ef1---pitotuwovozidudije.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/76248339313.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/024fa24132f38e5f91a59e3f51f88d39/30817436769.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/dugas.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/xofajifanopesezovak.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd949d2c80---83593884093.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/2b4d83c5249026fd3f64ae0f82298279/40183460909.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=glaciation+landforms+pdfPDF 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_off0000feb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB4 19404 bytes
SHA-256: 9699f25f8655afbb809af774fe80c8de00aedcf2f8857c3269f6353dd3ca027f
font_01_sfnt_off00013218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13218 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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