Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f5c1d87319f7266…

MALICIOUS

PDF

109.3 KB Created: 2021-08-02 08:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 125e7e19d85886444ff92019d772cfec SHA-1: ffe83458e9c809900e43759b1a17c123cf62775a SHA-256: 7f5c1d87319f7266375067b93f289bab8ea4ee69f9d86215c71cb6aa07dcb869
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised WordPress sites, identified by heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the structure suggests it's designed to lure users to malicious content hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7731

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://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608b153aab5f2---panefuneju.pdf In PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8bf32fd0---jasedisarage.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/93935460194.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210625_18D22E04BBF2656E.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4efe3cfe9---13146097697.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/guwotosajaxunigevig.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/74054701882.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093c3240d8a4---getepunexusimapapeseb.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/25442132402.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/tadonemuwokasit.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2ec72ab23---19920105571.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/resasinofu.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084de0a7b2e6---boguzititoru.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/nabababexigupovuzona.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/73dbe10d7c4c5b6e8ec3d6b0e0d7f958/57970818348.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/65942568273.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/kopisizifeposif.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/nirutisujipotilupemud.pdfIn PDF document text
    • http://samafb.org/uploadfilefiles/julowobebikute.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca94723bf0---fabizedenuxover.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/xowumu.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/sinamimulixevudedanog.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/6441126506.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609885b4c37da---sotuvesotuzumiwexurite.pdfIn PDF document text
    • https://wilocom.ro/ckfinder/userfiles/files/31504746764.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=full+hd+movies+2020+english+newPDF 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_off00017ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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