Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb8e2759c6f9aa6…

MALICIOUS

PDF

57.2 KB Created: 2021-09-08 01:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 28ec977f9cdc2a62c38dfda5e8b79b5d SHA-1: f94986517a171b02ee5dd6665c8e4b28b5526d28 SHA-256: feb8e2759c6f9aa6a56c2e5f3657da9e6b24d458c41691896a4aa127e0f7baac
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by 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 0.7333

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 https://archism.ru/uplcv?utm_term=bluebook+20th+edition+pdf+free+download PDF link annotation
    • http://www.deco-interieure.com/userfiles/file/vurafovimedikedat.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/wonanosakuzerudukuri.pdfIn PDF document text
    • http://ibb-online.ru/f/file/22105864149.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/tufuluvo.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/75102708792.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/54219809613.pdfIn PDF document text
    • http://vhshf.de/File/98268035165.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/240ce9aa6bc70302356ac665b4ae9bff/95427246521.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/9de9toehdfq495g80dftnp3b6e/8751179330.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/86718917078.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e78198e3a74---tikobulorolej.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53520289688.pdfIn PDF document text
    • https://ms02bet.com/contents/files/gesovizolola.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/berimelulututiderasuxol.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/woripiwab.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/642a401d80c80678081d11826bb5994a/8754869007.pdfIn PDF document text
    • https://www.geo-decouverte.com/ck/ckfinder/userfiles/files/38240495068.pdfIn PDF document text
    • http://flemisterbauldingfamily.com/clients/8/82/82a21d9598fc66f9117a8fb7222c8fd0/File/towegajezawolu.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/womizad.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ac66c8ae3c9---14944529598.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/7133312184.pdfIn PDF document text
    • http://xtra360.net/campannas/file/wimijorazosedakew.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/supofilozukema.pdfIn PDF document text
    • 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_off0000bd78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD78 11140 bytes
SHA-256: 28bd49b6eee366efe16c46fffe3ffeba546e95dd8b50a3ba7f8fd51dec96fbfa

Open this report in the interactive analyzer, or submit your own file for analysis.