Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8821e28585780c…

MALICIOUS

PDF

63.7 KB Created: 2021-09-21 09:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a0a49d53f7a579781c4fdec5ed993535 SHA-1: fbc0c5bfd73c9a5dad050e59ce0be3221333a62c SHA-256: ff8821e28585780cfdf5a29b857a4b758fb986ea9a9d9223d405ef7e5bb1914e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a high heuristic firing indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection further support its malicious nature, likely for phishing or malware distribution. No scripts were extracted, but the structure suggests an attempt to redirect users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://sirmamedia.com/ckfinder/userfiles/files/30335027905.pdf In PDF document text
    • http://coinproject.com/userfiles/image/file/89758948888.pdfIn PDF document text
    • https://movingalpsfoundation.ch/userfiles/file/48243301030.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/67325147633.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210914181352.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/meburo.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/45748494855.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/ritabavegutajeletipil.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/fotulabesitagujuponuxak.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/zobeji.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/7289470123.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/20727770887.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/gikeda.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/7553233477.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/90965651041.pdfIn PDF document text
    • http://kadet-ck.cz/pic/file/77669626341.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16147e3a28eeb2---vavimatabida.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/53738782656.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/zexasudogewedaw.pdfIn PDF document text
    • https://andana.us/files/files/sumejofavelozexukepot.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/4a0521a14bbdefdf605fdff2a35f3d8b/48100552105.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=best+android+sms+backupPDF link annotation
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/81175953585.pdfIn PDF document text