Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d87dc5a6e29d04…

MALICIOUS

PDF

59.9 KB Created: 2021-05-10 09:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1923d5124c2c9491bde97dd9dd46327c SHA-1: 01eb9cea861f380bbc0227028c924b8906f8b331 SHA-256: f6d87dc5a6e29d043ba97a8cb9bbfa9bd882ebbb2c2ad51806c6ffff0d19be0d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, directing users to various websites hosted on compromised CMS platforms. The document's content, though heavily obfuscated, appears to be a lure related to pharmaceutical products, likely intended to trick users into clicking malicious links. The ML classifier also flagged this PDF as malicious, supporting the assessment of its harmful intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6609

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://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086507ee1ed8---80885410089.pdf In PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/030e2f11405937d76bc20abceb346f66/46784842711.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/17402630619.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9323796be---48363602534.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607322cf3485a---71271439843.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adf58b2043---vazudaxuli.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/povafozeluvobigo.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/64255096073.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608074a18cd21---78439840701.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/n5ne4cnr724foro24g8s7dvvh4/fuwumaja.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160812649503be---1921826610.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d356df2220---400241588.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/1v2fh48svmsh38st550ttuj347/17111938111.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=metformina+clorhidrato+850+mgPDF link annotation

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