Malicious PDF — malware analysis report

Static analysis result for SHA-256 65293973e7c7996a…

MALICIOUS

PDF

66.5 KB Created: 2021-09-17 20:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 797570b1a627cdb4df28d36270174172 SHA-1: dffe2d7a4373fc176c346af38fd9f2711a5342cb SHA-256: 65293973e7c7996a84cff8d354eaf354fa48999acd026b7cb8d0f4f97f7542dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further support its malicious nature. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5231

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 http://aviteksural.ru/admin/ckfinder/userfiles/files/16966334549.pdf In PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/tijedaxafasimudek.pdfIn PDF document text
    • http://tamtamphat.com/upload/files/forar.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/rupexudimo.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614274419db77---81137030082.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614440139b651---monabogenogire.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/desidulevuribefugisewap.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/39407428755.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210912_051f7.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/vutanaxuworumiwaj.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210913153536.pdfIn PDF document text
    • http://bndweb.nl/upload/files/95154705373.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-5/20210905075647437620.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021090613051235.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613f49e7e786a---14049972934.pdfIn PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/berevavokepipabuvolasixiz.pdfIn PDF document text
    • https://biocoils.com/img/file/gidepirixukekusipe.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/61660682329.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/fazuvexifa.pdfIn PDF document text
    • http://kasand.com/userfiles/gakegow.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/mixuxafelabezunibexadiwox.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/88e0fc89dda789865fe0697c4407dcbb/lokekuzajoxuko.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130749b48a98---jamewerapapeb.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/zaxidudelatobi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=bared+to+you+book+pdf+downloadPDF 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_off0000d392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD392 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA9 10816 bytes
SHA-256: 1231c9de7a3d0279e5272338d571ffc57f2c6a4c992a2877f509472baf029c2d

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