Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ed72a0dc54a06a…

MALICIOUS

PDF

82.8 KB Created: 2021-05-07 08:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e88d86e05ac0a9d8e9a48b590a9a870 SHA-1: a9f2ef6aef08856a79a08488d1d06bac048d6f41 SHA-256: 92ed72a0dc54a06ae73d4aac4118c2be34133c79dd00b182c590351054bd17b0
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'botokaw.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to 'Barron's sat prep book 2020'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=barron%2527s+sat+prep+book+2020
    • https://cdn-cms.f-static.net/uploads/4409616/normal_603e6438b2b79.pdf
    • http://levojefozaloro.mywebcommunity.org/golamuxuwapelupuvus.pdf
    • https://static.s123-cdn-static.com/uploads/4377128/normal_5fcbdfd3a66c6.pdf
    • https://cdn-cms.f-static.net/uploads/4421614/normal_5fdb245b8ce9c.pdf
    • http://gosoxegekiri.mywebcommunity.org/xixuzudegalovanegome.pdf
    • http://negimemexib.iblogger.org/hey_jude_piano_score.pdf
    • http://wozufilugud.iblogger.org/69947429539.pdf
    • http://bimoriz.getenjoyment.net/dd_monster_miniatures_uk.pdf
    • https://cdn-cms.f-static.net/uploads/4413374/normal_6027cb5cda7c1.pdf
    • http://bomezifubaf.iblogger.org/best_information_technology_jobs.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/woxewiwupir/why_is_my_milwaukee_charger_flashing_red_and_green.pdf
    • http://refofigeto.epizy.com/80092365912.pdf
    • http://bumilamufitilu.epizy.com/88085241227.pdf
    • https://s3.amazonaws.com/kizugokofo/8138072271.pdf
    • http://bavatesivo.myartsonline.com/94314601694.pdf
    • http://jaterivi.epizy.com/33955863582.pdf
    • http://kikadof.epizy.com/look_up_stock_symbols_by_company_name.pdf
    • http://wasaxotudulolo.epizy.com/is_vampire_diaries_suitable_for_13_year_olds.pdf
    • https://s3.amazonaws.com/sisaxu/vietnam_miss_universe_answer.pdf
    • http://ruwozubusa.epizy.com/algebra_1_textbook_hmh.pdf
    • http://liraperuwuw.atwebpages.com/philips_voice_tracer_audio_recorder.pdf
    • http://pesuvomekujidi.rf.gd/mp4_video_editor_windows_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010783.bin
cbb16829387da892b689125e910ecf2fbb059d47a8888a6b3b64824643a7b13d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10783 5340 bytes
font_01_sfnt_off000119c3.bin
f4a8b00d09b1d7484474c9d86bd0dd5559cd7805760e257505c88736e09387c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x119C3 10700 bytes