Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58b4c69f131dbb8…

MALICIOUS

PDF

80.6 KB Created: 2021-07-14 01:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 615af4d5f353edd39ec887ea9cc4d233 SHA-1: 06cff0c871208c1174d887381463c77fe9b89096 SHA-256: b58b4c69f131dbb851eb3948d4604fec6cccc182f89be01f4da2abcc931e8c34
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malware or lead users to phishing sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2676

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 https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/7241a2f070ad032464e9f2f080ef5039/radobofapuvitofiguku.pdf In PDF document text
    • http://chalappuram.com/userfiles/file/kivijulu.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16071d2e08e52d---diwalovozasogofatuwem.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b0426f684---18091473016.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/tajagubasugurutasuv.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/gobugusizubimifabuluta.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/tavadutekezudusegosoja.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/ragmp7jev6ua0vnkda8e8lt911/16973417247.pdfIn PDF document text
    • https://qpshouse.com/upload/image/file/31389820857.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/migofulerukewiwitunof.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4dcd5a48b---navotulovuzabelugudob.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/6af925413c0a9a04718ece8209d06912/15487930633.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/68496035588.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4c821c818---45437015478.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210704_071950.pdfIn PDF document text
    • http://guchenes.com/d/files/vifotijixevori.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/fimopefasuge.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16085102ed4d30---xudoda.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/wafefalutopi.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/49ef1297784b83ec8a7f6c3669f6c0bb/bawuzenejo.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/29980346917.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16084d32e88643---5059260603.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607f65d9422ae---laraverigofasebim.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66313766637.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088403fa47de---5732488155.pdfIn PDF document text
    • http://mhspartan79.com/clients/9/97/97d0d0788ec4d6723ba7be3cd58769e3/File/tufivuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=gta+v+apk+and+obb+file+download+for+androidPDF 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_off0000f13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13F 17492 bytes
SHA-256: dce21ab0f1101ea6f47dd8709c7395c058e223cf2ed1ee28828a2b2ac93ade82
font_01_sfnt_off00011e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1