Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e95eaff7b6c6e07…

MALICIOUS

PDF

80.6 KB Created: 2021-08-07 09:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 548817b1e3f573b7dc8bc41557f7348e SHA-1: 36026b1a4498ff5b696c230814de534677070ff9 SHA-256: 1e95eaff7b6c6e07f2aab5b55d5bfc1ae8f1b9dc0790223281568e5d7860afa1
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting. This structure strongly suggests a link farm designed to redirect users to malicious sites, likely for phishing or to download further malware. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7573

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://www.lugashotel.com/data/editorfile/93826689887.pdf In PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/149463cf78a799ad6deeba5ab60c5914/ravajijakafamer.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/xarenaxigedinirigilujoban.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/radawobojuvuguxaxe.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1ae6cd975---gekolatoluderumeponirive.pdfIn PDF document text
    • http://cartopack.be/Images/file/25898992196.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd05ece0dd---98773447968.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/vitiwitavitisupazufuxugu.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc26727890---9007492054.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/kusajomoxe.pdfIn PDF document text
    • http://teresachild.com/upload/files/wemiwuwoga.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/64925509403.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/31580049038.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/444a054334180017fb2d2fc446407f42/15808769159.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/20439769180.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/bogolorewiruxigi.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610c7cb4b619f---68397424347.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/60391248528.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/lummoq4q9pv954qbtu2hj9rda1/91468820838.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077ad07d1f50---natimotivoke.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/bsctcc96hh8osop05scf4p6n70/40616444500.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+factory+reset+brother+mfc+l2700dwPDF 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_off0000f0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DC 17264 bytes
SHA-256: 7a4e83b413cddfc9962b4ec6c14d3c35afebac81e7a2d46c25f6ab21573e676f

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