Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cfd6b6921bcd18a…

MALICIOUS

PDF

69.9 KB Created: 2021-09-11 11:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: acc98f9989ec603f0e9113b285e07301 SHA-1: 7cfa878a684b3fb798d3e8910fbe1058ccde8075 SHA-256: 4cfd6b6921bcd18a017311c43c6e668f50dbd920218a09a305187c3833407992
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5802

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://www.cottagegrad.ru/files/file/samofekuzikusezif.pdf In PDF document text
    • http://supermarketdv.ru/files/file/65358310563.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/xivefaxu.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/40673192909.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/d86f72839921ee2da8bd51b506e93626/sexid.pdfIn PDF document text
    • https://greenboo.vn/uploads/files/fujunilipasa.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/94623433061.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/5d2qc89dmc8171f0gh3kped54p/tikebotulebiwow.pdfIn PDF document text
    • http://ancheng-medical.com/uploadfile/files/4357461864.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/58442561632.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613516e92d8b5---ravusunanusa.pdfIn PDF document text
    • http://yanartextil.com/firma/files/wirolarinimo.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/33995692960.pdfIn PDF document text
    • http://lyzph.com/userfiles/file/Fl202109030658278235.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109060005249362.pdfIn PDF document text
    • https://kvzriu.org/images/file/dudikasinudidazibufidegeg.pdfIn PDF document text
    • http://serenetour.com/image/upload/File/35255407320.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/63132834725.pdfIn PDF document text
    • http://kamakuralosgatos.com/uploads/files/tikanimoxugajikeg.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/33930555045.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/46269203565.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/28082528696.pdfIn PDF document text
    • http://petrduchek.com/files/10775689083.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=snake+eyes+new+moviePDF link annotation

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