Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c130ff31a4f3937…

MALICIOUS

PDF

76.4 KB Created: 2021-03-04 11:08:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ea03ab09fa6afc385eaf9b4aa5ff3996 SHA-1: f1598eebf838f17a7365bf0f071d2750099ef781 SHA-256: 5c130ff31a4f39378e0508d82a5a7fc982c03f945fee9fd46a7f7711f19d4d42
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://crophysi.ru/123?utm_term=why+is+my+rca+tablet+running+slow In PDF document text
    • http://jidapuxedepu.medianewsonline.com/72687791341.pdfIn PDF document text
    • http://xosudodobuj.iblogger.org/xepudemo.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/pif8hji/spider_solitaire_msn_games_free_online.pdfIn PDF document text
    • http://doordash.link/zibimebidarabind8wc.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/4Aievib/pawirixabapakasug.pdfIn PDF document text
    • http://fojogil.iblogger.org/which_type_of_tubing_or_piping_should_be_used_for_natural_gas_on_a_gas_furnace.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/zmodo_camera_setup_troubleshooting.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/Aiiijgj/72867956703.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/cgefXca/faroxedezupabufidojidegu.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/e7L5tow/ski_jump_game_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/idGgr4U/crossword_daily_word_puzzles.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/hdhe5ge/k_pop_artist_dies.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nezebur.epizy.com/introduction_to_computer_science_tutorial_point.pdfIn PDF document text
    • http://bogazukutij.rf.gd/sazikesitefafogaset.pdfIn PDF document text
    • http://tirisesu.onlinewebshop.net/94297742676.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_off0000ec15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC15 5560 bytes
SHA-256: a6bbdd12f92b3efdd3da9622fee7042fba052330f04a3cc6beb22d68710261d4
font_01_sfnt_off0000fef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF3 11028 bytes
SHA-256: 190f55e7b5b70f323dd1c5bd45cad27d9aaf0ef32e670581b7bd581cd58badc6