Malicious PDF — malware analysis report

Static analysis result for SHA-256 38eebcd6f9298677…

MALICIOUS

PDF

70.7 KB Created: 2021-09-03 08:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 43e154538eeec3cdda7f4370e8198cae SHA-1: dff6016b0b73445a489e1c317c14e236fc44e5a4 SHA-256: 38eebcd6f9298677077aa4bd64394e08c6c251a43b3f007012954536a8a54c12
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The file's structure and URL patterns suggest it's designed to lure users into clicking links that lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6745

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://coretry.ru/uplcv?utm_term=find+the+hazards+in+the+kitchen+worksheet+answers PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a340a771143---warux.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/25475145963.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf6be0190---18754401425.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/8b81d205eb337ec6cec9fc4a8a4fb0b8/bumibadojoxa.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23280db3c0---2023661237.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/lezetevelulumojelowodewaw.pdfIn PDF document text
    • http://taxfreepoint.com/file/93673600769.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/14026243844.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e258dbfdd0---xemitasorodox.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e480c9ad143---85858469619.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/80324227454.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/24912098698.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ruk12hn3efgefqtpge9in9n79b/wadozoguzukunamim.pdfIn PDF document text
    • https://conviviodihera.it/dati/upload/file/viretike.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d901ef956---99523866796.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160e65cabc9a9b---robij.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/nalar.pdfIn PDF document text
    • http://ray-king67reunion.com/clients/41562/File/wuzarugudonufepok.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed878092f6b---muzanepunesozofu.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ub51kp3lbrmqtepj20v56p23n6/geganoju.pdfIn PDF document text
    • http://www.santabriganti.org/admin/ckfinder/userfiles/files/79701266604.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109e5e912d60---jekuxepepabajegiloni.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/karil.pdfIn PDF document text
    • 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_off0000db22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB22 15736 bytes
SHA-256: 9521a8b4aef3446e8b85a173b4c22128be69e0d22c8b4f4a5f9e67328cd437cb
font_01_sfnt_off00010391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10391 10636 bytes
SHA-256: e2e0591ce3cd34f6c0d1f6232a1fb91c7129b183723d6d718b02340e03607e82