Malicious PDF — malware analysis report

Static analysis result for SHA-256 83deb1a5699e285b…

MALICIOUS

PDF

79.4 KB Created: 2021-03-06 18:44:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d4e53701a2b85efb7ed3c2d286efbe89 SHA-1: 97b0e448c93b27aaa3f43bd9bf003c4d4b92fdc2 SHA-256: 83deb1a5699e285b9a44ec28c81864fce0802640e299aee3305d82aa17d9f3b8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, including one pointing to 'bologen.ru' which is presented as a survey answer key. Another URL, 'lesuxofozadize.mygamesonline.org', is part of a link farm hosted on disposable domains, suggesting a coordinated effort for malicious redirection. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=lab+peppered+moth+survey+answer+key PDF link annotation
    • http://lesuxofozadize.mygamesonline.org/pokemon_fire_red_cheats_gameshark.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/ijbhhpE/pogelexafirizulaxinuxivu.pdfIn PDF document text
    • http://fufirewavit.getenjoyment.net/fotasezifelujewi.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaluwozez/hGhjuKy/heavy_metal_radio_stations_fm_chicago.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/jciaN37/master_craft_block_mini_crafting_games.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/gdaljim/prison_escape_puzzle_walkthrough_level_5.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/cdgeohc/beautyplus_magical_camera_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/feyhcLY/69883750368.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/37069806666.pdfIn PDF document text
    • http://maxirem.mygamesonline.org/wivovarokasika.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/49768045360.pdfIn PDF document text
    • http://gujufifirisin.22web.org/pokemon_explorers_of_sky_evolution_guide.pdfIn PDF document text
    • http://xevamoz.mygamesonline.org/strength_based_approach_in_social_work_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/novupezezis/iPHBOij/fuboxus.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/what_are_the_types_of_dragons_in_wings_of_fire.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://judiserod.onlinewebshop.net/12581279328.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/sexinojowukuwud.pdfIn PDF document text
    • http://fugufaza.myartsonline.com/disability_support_pension_impairment_tables_2018.pdfIn PDF document text
    • http://jefepar.rf.gd/safe_coliform_levels_in_well_water.pdfIn PDF document text
    • http://bazokupakem.epizy.com/can_you_develop_android_apps_on_mac.pdfIn PDF document text
    • http://roveramo.atwebpages.com/21929665551.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_off0000eb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7F 5568 bytes
SHA-256: 2789bfd920d1d39567d3fb1dc63a66a9671ae4e6f26174dd2f9ab5fc5c17e834
font_01_sfnt_off0000fe52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE52 16304 bytes
SHA-256: a662480126d1fe9fae8fdd16793c571526a68248fd2952b06b796fc7b93b1876

Open this report in the interactive analyzer, or submit your own file for analysis.