Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b7efa54db6bdb2…

MALICIOUS

PDF

81.2 KB Created: 2021-04-21 23:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a45cac106f6d5e7d7b83b4c61f9c6bde SHA-1: d2bb8348860e18077826ba8dd15ccb5679d84cea SHA-256: b9b7efa54db6bdb2f29656088c742529eb8dfdb39ec556a62e9afb3c5849142f
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of multiple external URLs, including one associated with a potential phishing lure ('botokaw.ru/strik'), suggests the document is designed to redirect users to malicious content. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the phishing pretext by indicating a visual call-to-action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/strik?utm_term=basic+electrical+engineering+jb+gupta+pdf+download
    • https://cdn.sqhk.co/marixefe/hniggin/football_manager_2020_league_rankings.pdf
    • https://cdn.sqhk.co/simixejazir/xgcjxgj/rijikarijilisaj.pdf
    • http://belepebo.mywebcommunity.org/beginner_bodybuilding_workout_plan_and_diet.pdf
    • https://cdn.sqhk.co/manizamo/lgiidv0/46757423963.pdf
    • https://cdn.sqhk.co/wevexifimur/ihhHVgh/dikisokowurifajulep.pdf
    • http://wejowadizabudex.mypressonline.com/educational_psychology_journals.pdf
    • https://cdn.sqhk.co/robimovule/ehegh5T/christmas_restaurant_cooking_story_cooking_games_mod_apk.pdf
    • http://sunakijabe.sportsontheweb.net/banking_terminology_dictionary.pdf
    • https://cdn.sqhk.co/pigevikuwi/j7aXghR/takefaj.pdf
    • https://cdn.sqhk.co/mosepoxik/Xidjgdx/1673175887.pdf
    • https://cdn.sqhk.co/busumodofu/ijaT5ha/coupons_for_walmart_grocery.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wisunabowogus.epizy.com/dokomujawokukegeb.pdf
    • http://votararinugofu.rf.gd/kirkland_signature_8.0_hearing_aid_manual.pdf
    • https://s3.amazonaws.com/supefujoxopubu/jim_carrey_christmas_carol_full_movie_youtube.pdf
    • http://bokubipojofoji.rf.gd/gastroenteritis_viral_pediatria.pdf
    • http://jejogekatexun.epizy.com/good_interview_questions_to_ask_a_job_candidate.pdf
    • http://dinedasuzo.rf.gd/being_alive.pdf
    • http://makonejun.rf.gd/58682774168.pdf
    • https://s3.amazonaws.com/nademopor/english_101_class_reflection_essay.pdf
    • http://polilofu.onlinewebshop.net/51839351074.pdf
    • http://pupitudaxomibi.epizy.com/topaguwelikawusegexameno.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f286.bin
3432c5a23b74f43b203c6d5c9ff2a454edde09a980996764bdbbbd908ec14fe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF286 5560 bytes
font_01_sfnt_off00010577.bin
fe5f6c5c9089f4f56b6487d4fea9b95b6f39cc0b4e7da94ec6b5dfaaa0d39385		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10577 10412 bytes
font_02_sfnt_off000128f8.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128F8 4324 bytes

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