Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3d2e2f9a93ac1f…

MALICIOUS

PDF

50.6 KB Created: 2021-01-22 23:35:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c4fa3af362c552bfea9d8eb0474e6b20 SHA-1: c412b077c045b17d0241460c6e24e9448a9424c5 SHA-256: ed3d2e2f9a93ac1f79ea717c3d40dcfba208c0c5f1263a393d55ed176fe8d44c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs, with one pointing to 'trafffi.ru', suggesting a phishing or redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm hosted on disposable domains, further supporting a malicious intent to drive traffic to potentially harmful sites. No scripts were extracted, but the presence of external links and the overall detection profile strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9372

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://trafffi.ru/aws?utm_term=bed+sheet+sets+clearance PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450512/normal_5ff8dabf176dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495400/normal_5ff50e6ddc92f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_5fe9ab3dae154.pdfIn PDF document text
    • https://site-1176800.mozfiles.com/files/1176800/spreadsheet_in_sap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379613/normal_5fd1f4b154d15.pdfIn PDF document text
    • https://site-1177263.mozfiles.com/files/1177263/ice_hockey_skates_size_4.pdfIn PDF document text
    • https://site-1174906.mozfiles.com/files/1174906/download_game_3on3_freestyle_basketball_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gidufulelav/11WBPBd/very_loud_ringtones_free_download_for_iphone.pdfIn PDF document text
    • https://site-1175494.mozfiles.com/files/1175494/polurironu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485004/normal_5ff9892c6af57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405907/normal_5fcd6bead487f.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/jihgieg/joker_2019_sheet_music.pdfIn PDF document text
    • https://site-1173152.mozfiles.com/files/1173152/pejaxexejaxutiwamozekedun.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/best_economical_manual_cars.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/metformina_efectos_secundarios.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/wikoku.pdfIn PDF document text
    • http://nomapalugaji.epizy.com/rivorujujigasematawi.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/al_quran_digital_pc.pdfIn PDF document text
    • http://vezexosewomex.epizy.com/zupinovi.pdfIn PDF document text
    • http://sosasofojatage.epizy.com/baldi_school_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/baker_encyclopedia_of_christian_apologetics.pdfIn PDF document text

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