Malicious PDF — malware analysis report

Static analysis result for SHA-256 425c1a896c0ee1a5…

MALICIOUS

PDF

65.5 KB Created: 2021-04-13 21:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: fe4a6713e0afe31391d852a899d6300d SHA-1: a865a99c4e4a80d9a1ea68dd53efc3abd404750b SHA-256: 425c1a896c0ee1a51506eedf58abf94203c280dcf01a7075608aa99fe3ea6ea8
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'Star Wars thrawn trilogy comic', likely to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6589

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=star+wars+thrawn+trilogy+comic In PDF document text
    • https://cdn.sqhk.co/xedopuwuzosa/0lvgjR9/bengali_movie_2018_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_6024bf052fca5.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/n5jaFhf/jimu_app_apk.pdfIn PDF document text
    • http://baderezu.scienceontheweb.net/fourier_analysis_of_time_series_an_introduction.pdfIn PDF document text
    • http://wubujonil.getenjoyment.net/81672851319.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458161/normal_5fc60287b036c.pdfIn PDF document text
    • https://cdn.sqhk.co/batovafakupo/cjjiiia/gawatofekamumu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465704/normal_6066b03195fcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425501/normal_603a3e7c69a27.pdfIn PDF document text
    • https://cdn.sqhk.co/zalenelavup/gclAPgf/paxofakegufibupamovawufav.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/inieZij/86507371647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377125/normal_602b8702f21f0.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/bukotoxodopawo.pdfIn PDF document text
    • http://zewadomi.myartsonline.com/52322972459.pdfIn PDF document text
    • http://vesedakowata.onlinewebshop.net/the_broaden_and_build_theory_of_positive_emotions.pdfIn PDF document text
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_c3e5268785d94383a083a0c3ba9e2813.pdf?index=trueIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_42cd77b9ba304aa49db0713ab4a0683e.pdf?index=trueIn PDF document text
    • http://wugujub.onlinewebshop.net/felufuwokukabodawi.pdfIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_c1f468fd85b745e4aa1b6f9298a9e1b6.pdf?index=trueIn PDF document text
    • http://japamitafixe.myartsonline.com/6471999521.pdfIn PDF document text
    • http://kebenubes.onlinewebshop.net/86791756335.pdfIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_3cf9099dd524445da6119c5a6b0b91b3.pdf?index=trueIn PDF document text

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