Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a27cb9297adcf3d…

MALICIOUS

PDF

63.8 KB Created: 2021-09-03 17:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c3ea33794a8dab29f606abfd8612898b SHA-1: 82cce2c97e9284aea3db116ac1686c4867ec51f9 SHA-256: 9a27cb9297adcf3d1dbb013b11cc8e8e58468b5247b99c3e1df550bde40de246
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 upload directories. Heuristics indicate this is a link farm designed to host malicious PDFs, likely for phishing or malware delivery. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8532

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://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/sb8cdjrupob9h0guhl2gtaoadq/55525135672.pdf In PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092451394bdd---61854482262.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/metuloja.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2162ed075---bevovexivo.pdfIn PDF document text
    • http://burrburroughsfamily.com/clients/55468/File/77171004579.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/c24ac68d55be117ab8649654fe22db7f/zowixiwekotus.pdfIn PDF document text
    • http://aweibel.com/Photo/file/kewezubuk.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/dece2758b333335ec11dddc001e63087/vatos.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/49089238714.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/14761753704.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a14b18bd7a---tejixojezivemejasudabu.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/zalomowipuper.pdfIn PDF document text
    • https://digiconelectronics.com/media/nesejamobuvidimoket.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/d4f23938c68812f79196c1f82d51d17a/9992041312.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/bawufarumi.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/161110d4313cff---lukalib.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/25488689433.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/9c0e9f5eda7df059c0dab6c15ce4328d/kazetanovupug.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/069cc0313081842a7e3e38fa822a8c82/52662239115.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///93621877778.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/39363149827.pdfIn PDF document text
    • http://futboltotal.net/images/files/12015960457.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/xogigewuwoxewen.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/2c4e9b0814d8a3be2bb34835de7eda96/89528083772.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e90308e5c5c---31766913497.pdfIn PDF document text
    • http://cmtoolsrental.com/user_img/files/68738789756.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=computer+memory+pdf+filePDF 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_off0000d623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD623 10468 bytes
SHA-256: 305141b40a0a96177c31f7be32d2c1f3abf1fc3d11171afcbbc13c89f4d14d7c

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