Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dadb93fef2b50b1…

MALICIOUS

PDF

67.9 KB Created: 2021-07-19 02:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 624726af552aa71cbbe10ae8f445f09d SHA-1: e7151f859dcea882868b835eef146f9264798f80 SHA-256: 2dadb93fef2b50b1747f16a21df914972ff95cdefb16e95a5dfecc9290a2a2a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute traffic or potentially host malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6824

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://stonestudio.pl/files/upload/file/taruxofedomatasos.pdf In PDF document text
    • https://aterhesseg.com/up_image/file/mizewopekel.pdfIn PDF document text
    • http://west-holding.com/userfiles/file/13925585527.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/87069153470.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/bomugaxaxusugavaxikisob.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df5c86ab9eb---lejetukaxonoburowedi.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/napawujepeton.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/ki5ase5mcv28q3rua1s7tlqdb0/1319387696.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/jvpgjf4g48s19i93jnd5sk8p3d/vatud.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/gipanunuzurenigema.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/96a61f17e73618a814c79fd5d396a722/85553292471.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2bc2cf408---rakerejasapunof.pdfIn PDF document text
    • http://slhs1958.com/clients/18590/File/54694293051.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/88394132295.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/28002548177.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/3b53dd3d04c9af00a760119813ae52f9/28296574446.pdfIn PDF document text
    • http://momsystem.ru/public/file/vugobewizudenujiruwazu.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160814b47ca79f---tonapixo.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/wamafibagugegugavuxuxa.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/40960271751.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0ec428908---82730445506.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608664e0cc2f4---61936605455.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c415c659f6b---27801245261.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/faxenirajosijojo.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfe1c8b8a2---11888490460.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=doctor+review+sitesPDF 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_off0000f5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F8 10064 bytes
SHA-256: 2cc6626615d0b726e3a02c66585715714ec6de04654254f8f90a95a2c1b7fffc

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