Malicious PDF — malware analysis report

Static analysis result for SHA-256 575f11e97d4c553d…

MALICIOUS

PDF

84.3 KB Created: 2021-03-15 07:14:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ce52090eb48e13bf4d15fef2e916b1bf SHA-1: 3fe2f69f63fd748f956150df2af60d5404fc30ca SHA-256: 575f11e97d4c553d0e0a549d9d624af0c4818a7936204d7b8afe7843711f452a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL heuristics suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://jacksth.ru/award?keyword=the+ambidextrous+organization+designing+dual+structures+for+innovation+pdf PDF link annotation
    • http://lofajemami.sportsontheweb.net/will_the_magicians_season_5_be_on_netflix.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/is_first_response_pregnancy_test_good.pdfIn PDF document text
    • http://jenirafona.22web.org/spoken_english_course_online.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/53729932936.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/natewiza.pdfIn PDF document text
    • http://vomoliba.scienceontheweb.net/room_design_book.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/47577293543.pdfIn PDF document text
    • http://matagenomix.22web.org/70703007526.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/5303819687.pdfIn PDF document text
    • http://fixadazopirutus.22web.org/how_to_use_a_dsc_alarm_system.pdfIn PDF document text
    • http://nexekuwa.22web.org/video_dance_practice_cbx_blooming_days.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/libro_de_instrumentacion_industrial_gratis.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/download_hp_officejet_4500_g510g-m_drivers_for_windows_7.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/introductory_mathematical_analysis_for_business_economics_13th_edition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rogofideb.onlinewebshop.net/how_to_fix_a_oven_knob.pdfIn PDF document text
    • http://dikinobi.rf.gd/welujogobajogebu.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/mabujusimewimazizasi.pdfIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/apartment_rental_agreement.pdfIn PDF document text
    • http://gijomifede.rf.gd/vowolupofavirula.pdfIn PDF document text
    • http://mesesoriran.epizy.com/2019_canada_elections_platforms.pdfIn PDF document text
    • http://desetezovadu.epizy.com/pamofoxegaxifutoparu.pdfIn PDF document text
    • http://xogijowag.onlinewebshop.net/10771305568.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_off00010b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B08 5836 bytes
SHA-256: 05a264165f93f71de99c7c65231caae7041f7d214ec98f152a962f63d540a8c9
font_01_sfnt_off00011ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECB 10624 bytes
SHA-256: 66146f4248600197fecf7fd0752719f4e46c5bca2a287cd865e4f273df9ac6c9

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