Malicious PDF — malware analysis report

Static analysis result for SHA-256 efb1288b0499dcad…

MALICIOUS

PDF

64.0 KB Created: 2021-09-21 23:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dde4d3d96e120102ea8076e8dad6d617 SHA-1: a8a0770f9d7bbfb2bbf9ab620e04db6534e4cec9 SHA-256: efb1288b0499dcade224d38713beed788a045faefe2b6b467e046020dcd1d582
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and flagged by an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm hosted on disposable domains. The primary function appears to be directing users to external, potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5809

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://sujatasfoodopolis.com/ckfinder/userfiles/files/foladusijademo.pdf
    • https://maximatrimony.com/ckfinder/userfiles/files/28605472740.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c295bccfe2---31758620951.pdf
    • https://emprenderem.cl/files/gepugasafixemuvutijesu.pdf
    • http://zhatuogz.com/uploadfile/file/56703941693.pdf
    • https://vicotelecom.vn/static/source/images/file/kovadadizemoxekoloko.pdf
    • http://haisushitogo.com/uploads/files/16284989456.pdf
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210910205325.pdf
    • http://energyexcess.com/userfiles/file/jegabime.pdf
    • http://pretaporter-pegah.com/userfiles/file/34663354776.pdf
    • http://hbisan.com/userfiles/file/kerasaf.pdf
    • http://hophungvietnam.com/app/webroot/uploads/files/pesopi.pdf
    • http://budoprojekt.eu/obrazy/file/bazoletokowivofefeziwuzox.pdf
    • https://whatshoulditcostme.com/userfiles/file/nufikivu.pdf
    • http://joy05.com/_UploadFile/Images/file/73585475896.pdf
    • https://bushregenerators.biz/userfiles/files/66647620324.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/47c1b26537d24d46349330a114cee80d/tubawewugugebi.pdf
    • http://madinaboys.com/easydo%20v2.00/files/uploads/23283236257.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8ba341357---kutitifirefoxobotus.pdf
    • http://jayeonrak.com/upfile_editor/2021/files/zibiwuv.pdf
    • http://baharev76.ru/userfiles/file/gabudozoruwi.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/f01ed70e081d9d466fc0edc6db7091bb/bitagirinido.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/161441df67e056---14946224246.pdf
    • https://vico-real-estate.com/ckfinder/userfiles/files/ruzije.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=best+dslr+camera+app+for+android+download
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc60.bin
ec7c3b967cacec7bf871a6b76c4f7c398526f90374476296603168f98c323160		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC60 16828 bytes
font_01_sfnt_off0000e73e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE73E 16792 bytes

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