Malicious PDF — malware analysis report

Static analysis result for SHA-256 89966b166d943fbc…

MALICIOUS

PDF

85.8 KB Created: 2021-07-21 05:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fb2f371207968a56df7f91136b0a0736 SHA-1: ba32741b01ce4efbb01980b720c78db44312e714 SHA-256: 89966b166d943fbc8fbb35bb8126d3699e3b2e60b922eacf4215b61a27b23567
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It functions as a link farm, with numerous embedded URLs pointing to external sites. Several of these URLs are hosted on compromised WordPress installations, indicating a potential phishing or malware distribution scheme. The presence of multiple links and the use of compromised hosting suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3778

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://natatourism.com/userfiles/files/ridaxeb.pdf In PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/fuhs9bv6csud5qripso2hsiekh/4204209122.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b46d4a153---vedisiwibedavurajewuvob.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c2940841660---6876259266.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/pp9bgcofish68p8qb7cir9hbu5/79137122589.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/52025091618.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f78a791d37---33814736701.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/4c21e081ef94c1132ae7719a5c1acde5/53155198484.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd0dbd3c95---12114248893.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/99802669217.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/bda12fd883d5888695dc7b686dafe363/24167418937.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be866453105---tudewezaxaxudokosaw.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cc296d4c9---rupazudolifopotibadomum.pdfIn PDF document text
    • http://1970lions.com/clients/5/57/57eb30a5877ba0c7834658d164206012/File/52702983868.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/togee74jdrksh5ria8lsjtslsr/44919364775.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b03b250fa41---nalemotofexiwiza.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/jadosutijimit.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/a71d3683cee46c192fa8dd8d812501c9/kulixemufilaze.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16080f54e00411---tutetidujodida.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/f1c9a46814c232c39a5dc4c5de54cdce/79976162283.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/jokadisuxenebozago.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/60805029184.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/52540660838.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c836b1b41---vilimazuguzarogivomovu.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/86119186889.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=in+the+hole+of+the+mountain+kingPDF 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_off0000fce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE5 19864 bytes
SHA-256: db1ed35d410b5c90a7bd05ecf1d6a49415a2e66f4d024b16f938d87015a95879
font_01_sfnt_off00012ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF0 10536 bytes
SHA-256: 360ebbf474d580efba0db397cb009a21d08bfb91a383a5cff4a6ba74046c8806