Malicious PDF — malware analysis report

Static analysis result for SHA-256 899d83226710a73c…

MALICIOUS

PDF

79.3 KB Created: 2021-08-11 03:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f560a23386d606c4cb67ba8cbd785a93 SHA-1: 19af3f979ad2cde13237286a286404ec0a600c4e SHA-256: 899d83226710a73c93b03de20db302ff0812327dddac5ff96f6107973a5ae09d
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm hosted on compromised websites. The embedded URLs, such as http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee4178157e---mosegaxab.pdf, likely serve as lures to direct users to download further malicious content. The PDF structure and the nature of the URLs suggest an attempt to exploit user trust for malicious downloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4964

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://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/0b323bjqpughcaa2cb545vhude/jegefikagejuba.pdf In PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//banegibevuribizajut.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160be18a9a3be8---gomuzozidawavelafi.pdfIn PDF document text
    • http://thietbixanh.net/uploads/files/renureguzuvereteriw.pdfIn PDF document text
    • http://mariangelesorrico.com/galeria/files/sobel.pdfIn PDF document text
    • https://easybuildapp.com/files/uploaded/files/suzawatalowivadiwirufev.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/13357387536.pdfIn PDF document text
    • http://ayhancevik.com/images_upload/files/fulixipuje.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee4178157e---mosegaxab.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/gakerizu.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/0baee0a8eefb1f33eb04f820d772dd89/81877679328.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/fcg0t3dqnvjs1nub5qusgkb7m0/75974212425.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/efhkrjvg282p6o2f8rm8cvsqp4/34761705617.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/75569932276.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/zafidoxetadexomikaj.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/rirexodi.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609458a8d8480---15048997682.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/23veub3a7969dd0f3oga50hbrt/18634884656.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/54371509f7387a8b8d38f1921f8c5efa/repokevop.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/c3va8btrdu2mb41qvh91amv7aq/15971774552.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/eolc868v3vf1hsh6jdtqsb6bhj/zupigadebilimebatogodixa.pdfIn PDF document text
    • http://mileschapelcme.org/clients/9/9b/9b85db73e8c1d5ae3bc18b6db4f26039/File/xepobonogenasakabufuvivi.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/serak.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/na8jrfgboaodr2cb47stmh0p9n/55758864856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=pokemon+emerald+soul+link+download+guidePDF 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_off00010bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000123e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E4 10772 bytes
SHA-256: 4b75894a7e8f092bc9f4bd56ce75f5fedadaa9f32b4399a28967f0c0d68a32eb