Malicious PDF — malware analysis report

Static analysis result for SHA-256 b932eb5a3136ec33…

MALICIOUS

PDF

68.9 KB Created: 2021-03-20 14:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 82547c847c610942f69ce4aba550b854 SHA-1: aceaa5189eb12c7dd458bca9f92789b872718370 SHA-256: b932eb5a3136ec33201199dfc98065ebf3c54e761b7e7782c60e4f15d4015464
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary one pointing to 'mezovuduw.ru', suggesting a lure to a malicious website. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates the document's purpose is to host many links on disposable domains, likely for SEO poisoning or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://mezovuduw.ru/wix?keyword=related+rates+practice+problems+khan+academy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477139/normal_5fd96d4a93922.pdfIn PDF document text
    • http://demask.space/65055401827a5h0z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408346/normal_603103ae80072.pdfIn PDF document text
    • https://cdn.sqhk.co/kinuneba/jhhihgf/pc_games_download_free_windows_7_2gb_ram.pdfIn PDF document text
    • https://cdn.sqhk.co/wenejusuzixe/hhAlv7v/5_little_clues_1_word.pdfIn PDF document text
    • https://cdn.sqhk.co/luwagoma/9jf0h0T/faxapififeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411694/normal_60256d168fb20.pdfIn PDF document text
    • http://allrecipes.pro/94838543894whg1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5fea2a7f5d4c5.pdfIn PDF document text
    • https://cdn.sqhk.co/gitopedevid/Eicul5T/77147068342.pdfIn PDF document text
    • http://tiktokhd.design/black_and_decker_model_lst136vz8qa.pdfIn PDF document text
    • http://zupuvotan.22web.org/feasibility_analysis_project_report_and_business_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/jiihpgj/equalizer_apo_1._2_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/loxepafigav/ijid6ae/microsoft_authenticator_app_on_apple_watch.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/14602691027.pdfIn PDF document text
    • http://mibijuzorifif.getenjoyment.net/53094691589.pdfIn PDF document text
    • https://cdn.sqhk.co/xejadukoxeta/a8jT1ii/sutimoderupone.pdfIn PDF document text
    • https://cdn.sqhk.co/xopigotax/ib6rii2/green_party_beliefs.pdfIn PDF document text
    • https://cdn.sqhk.co/sukonazukuv/Lidhdid/wow_wotlk_sacrifices_must_be_made.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477877/normal_600bce2504aa3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rawonisobux.rf.gd/3435763387.pdfIn PDF document text
    • http://rosevasejila.myartsonline.com/charmglow_grill_parts_near_me.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/candide_voltaire_chapter_18_summary.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34C 5628 bytes
SHA-256: 6b4a8e1a89b35b3b33a86dfac80f27ba2328e9f8d3f25d119bdf78f0f923614e
font_01_sfnt_off0000e640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE640 9172 bytes
SHA-256: ffe21a1da8c00e5aec3d4529119f43d182a584980c15f3d25939d661c2ddea8c

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