Malicious PDF — malware analysis report

Static analysis result for SHA-256 233da27da7e562fa…

MALICIOUS

PDF

88.0 KB Created: 2021-04-19 07:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da19c64a2a2a24cd33e2e39a7a6fe92f SHA-1: 71aa09863cbfa67829124b761eb009dbdf4a80d7 SHA-256: 233da27da7e562fa75f4143bbf695bab9ae631994d306f6c9b9e71bfc034c716
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that, when clicked, leads to a download disguised as a Diablo 2 patch. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of an external URI and the nature of the lure suggest a phishing attack aimed at tricking users into downloading potentially malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=diablo+2+patch_d2.mpq+1.13+download
    • https://cdn-cms.f-static.net/uploads/4446647/normal_6065b30e69134.pdf
    • https://cdn.sqhk.co/tovitaxani/g6ModE3/baby_s_first_words_app.pdf
    • http://xaxifibipebux.iblogger.org/the_penelopiad_page_count.pdf
    • http://pevelofuvewozi.22web.org/33153297017.pdf
    • https://cdn.sqhk.co/pamavunawi/dbjhcih/indoor_skydiving_san_diego_cost.pdf
    • http://zitarekatinupas.sportsontheweb.net/cricket_game_rules_and_regulations.pdf
    • https://cdn-cms.f-static.net/uploads/4402280/normal_6045040862fb8.pdf
    • https://cdn.sqhk.co/dawadetugas/bjj7jfq/sudifogosavotezakaw.pdf
    • http://jokojujut.medianewsonline.com/58133214535.pdf
    • http://ruregere.sportsontheweb.net/list_of_chemistry_formulas_class_12.pdf
    • http://nezowigivomi.scienceontheweb.net/hp_laserjet_p2035_printer_datasheet.pdf
    • https://static.s123-cdn-static.com/uploads/4424985/normal_5feea2797c024.pdf
    • http://komaxinatobofe.medianewsonline.com/forgotten_realms_2nd_edition.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wupixufekijax/how_to_install_electrical_switch_for_garbage_disposal.pdf
    • https://s3.amazonaws.com/lorifawuvawot/rinofinawobubuminadizezab.pdf
    • https://s3.amazonaws.com/lolijexejomak/11th_biology_book_free.pdf
    • http://solazupusowisa.rf.gd/xunuzubugesorit.pdf
    • http://kalavelixafuro.epizy.com/bewafa_tera_masoom_chehra_song_pagalworld.pdf
    • http://xunonevikonog.rf.gd/38394966232.pdf
    • https://s3.amazonaws.com/jivuxo/arm_cortex_a57_technical_reference_manual.pdf
    • https://s3.amazonaws.com/tobovunoberiki/fiketewida.pdf
    • https://s3.amazonaws.com/liguwubore/ability_definition.pdf
    • https://s3.amazonaws.com/zafibimutadoti/que_es_un_carro_con_titulo_salvage.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_off000107b8.bin
d9bc66787141f55d78c763255ff84aacdbba7384d05020b69480731178e1f80c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107B8 3692 bytes
font_01_sfnt_off0001150c.bin
8543490022837509e68e0318b7e2d79b1b23871eed7ab283af78c70fef1b74a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1150C 5804 bytes
font_02_sfnt_off000128cc.bin
a9a395b6f938b0cb84e5a0d287b3effab3095ca66dc1b3042fe3704b021f2a31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128CC 12272 bytes

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