Malicious PDF — malware analysis report

Static analysis result for SHA-256 978dc0062b0c50dc…

MALICIOUS

PDF

95.5 KB Created: 2021-06-08 07:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 659b332f7c125adea275a7a215df3af9 SHA-1: d8e7b499b8b24119315d32c2eed8f0714b59b731 SHA-256: 978dc0062b0c50dc88def54d00a4f85d3e876b98864c477f1628f3a931328609
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many pointing to disposable hosting and employing UTM parameters, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9328

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://garglob.ru/pbw?utm_term=korean+vocabulary+list+verbs PDF link annotation
    • https://teraxawazolazov.weebly.com/uploads/1/3/4/3/134386914/3513068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417205/normal_60445c67a85df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483362/normal_602c8caebe94c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424985/normal_5fca6def718cc.pdfIn PDF document text
    • https://nalebetiraj.weebly.com/uploads/1/3/4/6/134669494/2588792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_604937e6f224e.pdfIn PDF document text
    • http://lomubel.pbworks.com/f/elementary_and_intermediate_algebra_graphs_and_models_4th_edition.pdfIn PDF document text
    • http://kunixove.pbworks.com/f/26507965248.pdfIn PDF document text
    • http://feselikebapu.pbworks.com/w/file/fetch/144747099/vmware_player_portable_windows_7_64_bit_download.pdfIn PDF document text
    • http://rijunepupuja.pbworks.com/f/how_to_solve_word_problems_on_photomath.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a82fb9a1-915a-4d59-bf22-9fbbd12a302a/asus_router_rt-n66u_password_reset.pdfIn PDF document text
    • http://pajinap.pbworks.com/f/adhyatma_ramayanam_kilippattu_malayalam_lyrics.pdfIn PDF document text
    • http://litorabi.pbworks.com/f/settings_for_scotts_speedy_green_1000.pdfIn PDF document text
    • http://gonumutat.pbworks.com/w/file/fetch/144726636/95476280375.pdfIn PDF document text
    • http://vulazojab.pbworks.com/f/duzuzokupijivatapup.pdfIn PDF document text
    • http://vosebim.pbworks.com/w/file/fetch/144448758/24099637107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/623bb8fe-3c4b-4dfa-88d2-ae4074f9dcd4/poxaremugoguzeximipi.pdfIn PDF document text
    • http://kuperuxowix.pbworks.com/f/o_que__uma_arte_rupestre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc173beb-ba0d-47d5-bf41-f20a5712231f/11036342887.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/w/file/fetch/144599115/35448055303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c56738c8-8f9e-41f5-ad52-b19cc443fb15/differential_equations_with_boundary_value_problems_by_dennis_g_zill_3rd_edition.pdfIn PDF document text