Malicious PDF — malware analysis report

Static analysis result for SHA-256 e90224395d8eb37a…

MALICIOUS

PDF

81.5 KB Created: 2021-03-08 12:31:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: feaa9bb090da726237b819008044d40a SHA-1: bd632e02614e83fde9dc6c4171960a5a407cd713 SHA-256: e90224395d8eb37a5275d0a58895ac402bd28f9ce0438a93d64d8a444ced5ddc
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though partially corrupted, suggests a lure related to 'Verbos regulares e irregulares en ingles español pdf', likely to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/strik?utm_term=verbos+regulares+e+irregulares+en+ingles+espa%25C3%25B1ol+pdf PDF link annotation
    • http://rapejavom.22web.org/what_to_do_when_samsung_washing_machine_doesnt_spin.pdfIn PDF document text
    • https://cdn.sqhk.co/kupawusel/ibRtm61/espn_nfl_power_rankings_2021.pdfIn PDF document text
    • http://kumululurug.scienceontheweb.net/how_to_clean_dyson_cinetic_big_ball_multi_floor_filter.pdfIn PDF document text
    • http://hookup157.online/how_do_i_prepare_for_a_sales_manager_interview3is4e.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/SxjjhdY/xenizoletobo.pdfIn PDF document text
    • http://crawlmqyu.space/google_sheets_apple_numbersdhawe.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/cYLNhh9/44356722416.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/vixor.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/ejd3jgi/houseparty_games_app.pdfIn PDF document text
    • http://werenntaq.online/how_to_use_aircrack-ng_in_termux_without_root1wzbu.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/aihVCoW/fomevupisedazegame.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/haSidVf/zombie_doom_slayer_statue.pdfIn PDF document text
    • http://picsonair.com/sodasijmnl0r.pdfIn PDF document text
    • http://emirofficialzm.com/stephen_king_new_novel_2021c5ufj.pdfIn PDF document text
    • https://cdn.sqhk.co/kujexelorite/eib4QNP/wadovupubowutivawug.pdfIn PDF document text
    • http://repair-foto.ru/kitchenaid_kfp0719_7-cup_food_processor_reviewzthqe.pdfIn PDF document text
    • http://yoga-fitness.space/mi_launcher_apk_downloadnve2b.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/GPhjEbb/discovery_family_go_apple_tv.pdfIn PDF document text
    • http://nefritthebestthing.site/lopegubasumerujex3gmib.pdfIn PDF document text
    • http://gtomishebs.xyz/51050524159v88ya.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/dusif9j/60470500683.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jimomurapujivo.onlinewebshop.net/high_school_printable_book_report_template.pdfIn PDF document text
    • http://xugivazule.rf.gd/bibujaruzutus.pdfIn PDF document text
    • http://xukomaro.epizy.com/apostle_suleman_messages.pdfIn PDF document text
    • http://fowasabitafal.epizy.com/sample_mensa_test_questions_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5A 5328 bytes
SHA-256: c7d7026cb47925d6b239d8690803ec33af6f8754abeb39e76faa9951da16537c
font_01_sfnt_off00010032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 12312 bytes
SHA-256: 85610142f51bbd707d47fbe688f8f5f309740964f5f7fd4eb81ef0cfb19bbcd8
font_02_sfnt_off000126c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34