Malicious PDF — malware analysis report

Static analysis result for SHA-256 52eda968c660ab07…

MALICIOUS

PDF

88.7 KB Created: 2021-07-20 17:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7c0d829a52bcd5497e2d13a36d67e94d SHA-1: 8293150097ff4f894d5881ec4564e5e20b08a753 SHA-256: 52eda968c660ab07ce78e4d7481626993332e516db43f6bbf3cddd979bc419dd
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing users to multiple external URLs, many of which are hosted on compromised WordPress sites or disposable domains. This behavior is indicative of a phishing or malware distribution campaign, aiming to lure victims to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4575

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://asiajitu.com/contents//files/sosabijavuvone.pdf In PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/lfolvp87phii37gblv0eotlqi5/makobitidimetaga.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/32f2f64fc0e2e27721f37880a4432ca9/korenagiriwusedegifazeso.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/vuxali.pdfIn PDF document text
    • http://skupka23.ru/upload/m/66237639864.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/zuxazuxekawotox.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b8351e999---46160871.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160920f2e0d812---fuwebojebosupivi.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4d125eff7---papavogazefalibareda.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/danarezafasemu.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/55019445635.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/5008506925.pdfIn PDF document text
    • http://metallpress.ru/files/34385757449.pdfIn PDF document text
    • http://texmet.pl/userimages/file/20677399650.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb79b59ac9---11127458840.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/17222690471.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/kovakutibunowepefalijomir.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607961f112d53---19907540478.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608574d1b55c4---kigojudob.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/fa63bafee2ab1d6ec290fac986155d7e/fatadexu.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/cee9fd9d189433f6538b1759defd58ee/96586363514.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/f4f24d39266f455f3a4eeffaee573e30/10896805583.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=classic+hunter+leveling+buildPDF 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_off00010b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12314 17060 bytes
SHA-256: c8565ede05262d95c110f2d4c9279cdb85acbb6dbb7bbdfde08a2496c95d8c64

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