Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08b41ff67e29aba…

MALICIOUS

PDF

75.6 KB Created: 2021-04-22 13:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0b6b44d3e26385a4e5763f3cb1a1d0af SHA-1: 14758ada4bfd0f9f1f8b78eca86c1da8e5821505 SHA-256: c08b41ff67e29aba97260250249f95ac3f5e5cdbbe2fad1af720c8031fe0818d
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to disposable hosting domains and are likely part of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though obfuscated, contains a search query suggesting a lure to trick users into clicking on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://seumenha.ru/strik?utm_term=what+is+the+main+theme+of+stranger+things PDF link annotation
    • https://cdn.sqhk.co/kevovevude/2tzlgji/average_pilot_salary_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuniruf/ibBji5l/abnormal_echocardiogram_reports.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/dTQghdV/88513113651.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/9wrVghT/pejonukeli.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwebuvowo/dChcrjj/dress_up_games_anime_online.pdfIn PDF document text
    • http://wavasesinile.22web.org/pobisi.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/jegiia2/44443161908.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/ChJqhfz/maxeruzigijuk.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/A4ih5mL/khloe_kardashian_before_photoshop.pdfIn PDF document text
    • https://cdn.sqhk.co/mevexobuzur/hivOtrz/arcade_pusher_win_real_money_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mudozegiviw.epizy.com/56293116585.pdfIn PDF document text
    • http://divogidiguxofib.epizy.com/zelogamerike.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/significado_de_la_palabra_movimiento_uniforme.pdfIn PDF document text
    • http://zigadewat.epizy.com/abdul_qadir_jilani_books_in_urdu.pdfIn PDF document text
    • http://sigisifosa.rf.gd/13243726736.pdfIn PDF document text
    • http://zudagiropa.rf.gd/gente_toxica_bernardo_stamateas_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1a4ac3-9422-4ef9-8a22-5a806c189d58/how_to_get_rid_of_hard_pimples_on_forehead.pdfIn PDF document text
    • http://gobonelore.epizy.com/biology_objective_questions_and_answers_for_competitive_exams.pdfIn PDF document text
    • http://dajizipazubeva.epizy.com/anari_movie_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7462d71-b4d0-43f9-90a2-87e278b3985c/diehard_portable_power_1150_troubleshooting.pdfIn PDF document text
    • http://bapitibob.epizy.com/14740890727.pdfIn PDF document text
    • http://saretozegif.rf.gd/aditya_hrudayam_meaning_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/risk_matrix_chart_template_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/783952f2-9b5d-4ffe-80d5-2838aed98e7d/learn_tableau_prep_builder.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/fekezudabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e215542-296a-4936-a514-657d9f478510/troy_bilt_4_cycle_weed_eater_starts_then_dies.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_off0000e96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96C 5160 bytes
SHA-256: 8cb1ee0adfb95ae4c2f7976e518ee17a06afb45dc8b8bf4ac550b4f2bd1433c3
font_01_sfnt_off0000fadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADC 11164 bytes
SHA-256: 7ea597c191c573cfac4333c23974d0adb8e84f7e2d8a3a2130485e61fb350a8a