Malicious PDF — malware analysis report

Static analysis result for SHA-256 58bd904fdda5436b…

MALICIOUS

PDF

68.1 KB Created: 2021-03-01 23:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: db2873c84436a5b29eab4161c5bc04b3 SHA-1: 0e24e8d1930ae2fd3fa005891adbb6940c686351 SHA-256: 58bd904fdda5436bb495a2518204bcc9cd640b44a6ad44accb01ea31a9adb4dc
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/award?keyword=feminism+is+for+everybody+chapter+7+summary In PDF document text
    • http://circulyarkadigital.xyz/free_download_music_editing_software_for_pciiijj.pdfIn PDF document text
    • http://realnoe-obshenie.online/wasanorofewubawoxamolas43k0.pdfIn PDF document text
    • http://chunyoo.com/game_of_thrones_1_sezon_2_blm_altyazl_izledouo3.pdfIn PDF document text
    • http://hookup671.site/char_broil_big_easy_recipes_turkey_breastor1c1.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/41416543294.pdfIn PDF document text
    • https://cdn.sqhk.co/dikozogub/ilAthax/download_blocky_highway_mod_apk_android_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410727/normal_6001a969ec4bd.pdfIn PDF document text
    • http://meriline.store/lunuzovebajiba8sdrm.pdfIn PDF document text
    • https://cdn.sqhk.co/rotonoba/chaeTAc/zaden.pdfIn PDF document text
    • https://cdn.sqhk.co/magatile/bjbxhgR/55404294374.pdfIn PDF document text
    • http://satogolijosefas.iblogger.org/negigoseravefisilujaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/siboxowimu/wieZwjg/rainway_xbox_game_pass.pdfIn PDF document text
    • http://kzrovk.xyz/customary_law_in_south_africabrbjm.pdfIn PDF document text
    • https://cdn.sqhk.co/soboxuxafiso/fP62ahc/xosafalinaloto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pasazaxara.rf.gd/kaulana_na_pua_sheet_music.pdfIn PDF document text
    • http://zimopup.myartsonline.com/basic_elements_of_graphic_design_and_layout.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/vezaxidazana.pdfIn PDF document text
    • http://ribaxekag.epizy.com/lamonewotuwavurib.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_off0000cbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE2 5700 bytes
SHA-256: 44f451cc70651c4009d3778ad1689a263c69f5cf323032d00edaa088ba075b5d
font_01_sfnt_off0000df2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2B 10656 bytes
SHA-256: d71aabc8c28134546050ff4083e4c4722ce881f52ac2c2634d4111ee06ee4e2c