Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae9e45eb6f813ea…

MALICIOUS

PDF

64.0 KB Created: 2021-09-17 12:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2a6bbb77d85599f9e3d303b488a0e737 SHA-1: 83b66644522207e5f3cf1edd006f5e8c7e1c7f2d SHA-256: 7ae9e45eb6f813ea77a1ebfb8603bc7af27fa7bdb63e9eda128188df252f784f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting. Heuristics indicate this is a link farm designed to lure users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9203

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 http://srtcivilnorth.com/ckeditor_file/files/tapuxedosakaperekabil.pdf In PDF document text
    • http://indemo.pl/Image/files/dirunaso.pdfIn PDF document text
    • http://greenglobepms.com/uploads/22376833556.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/li7c3c97f2dkgd40bv2onhmg5h/dokivem.pdfIn PDF document text
    • http://ng-sons.com/userfiles/file/xovojuf.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/vuxeze.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210909_175731.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/vunedojufodote.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbf7906153---vuzixobutiva.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/61561794414.pdfIn PDF document text
    • http://archiw.bibliotekalesmierz.eu/img/upload/files/49886854033.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/95769350925.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/34619224077.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613cda17ddc6e---fodonebuw.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/71031579726.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/32430849645.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/binigefezujitixe.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a329de93c---71642469046.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sopuvejafebikepox.pdfIn PDF document text
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/39886754490.pdfIn PDF document text
    • https://il-gusto.com/images/file/76328971466.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/pebuwegew.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/xoguvi.pdfIn PDF document text
    • http://zbigniewrodak.pl/galeria/file/betuzevedapime.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/70932607748.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=types+of+tangramPDF link annotation
    • 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_off0000cda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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