Malicious PDF — malware analysis report

Static analysis result for SHA-256 2436e3ecd5381778…

MALICIOUS

PDF

77.3 KB Created: 2021-04-22 07:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51dde4805177dccf6273f15750c261f3 SHA-1: e22eacf0048e3c67a0009e2c37beb68e18b43460 SHA-256: 2436e3ecd5381778ad1c5296dcebf35122832d5d8f1cef82e8b02d3a75e363fb
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that leads to a suspicious domain, likely intended to deliver a secondary payload or phish for credentials. The document body, though partially corrupted, suggests a lure related to educational content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://kuzutuzo.ru/strik?utm_term=ejercicios+de+porcentajes+mayores+que+100
    • https://cdn.sqhk.co/dijexovesaf/eij2vRd/meaning_of_sadat_in_urdu_and_english.pdf
    • http://xitelisefevo.22web.org/was_it_a_dream_theme.pdf
    • http://novofikupeneda.mywebcommunity.org/kafefopiwimixetebifafat.pdf
    • https://cdn.sqhk.co/letijefa/Sjgijdm/bleacher_report_smackdown_1000.pdf
    • http://texukajiz.iblogger.org/59983345393.pdf
    • https://cdn.sqhk.co/nazamesuwute/UhaQdZN/highway_rider_motorcycle_racer_mod_apk.pdf
    • http://gudokav.sportsontheweb.net/ncaa_division_2_basketball_tournament.pdf
    • https://cdn.sqhk.co/tudenireso/gijhhR6/basket_wall_shelf.pdf
    • http://figejewumoposes.getenjoyment.net/32855550242.pdf
    • http://wejuzofibab.medianewsonline.com/information_technology_degree_worth_it_reddit.pdf
    • https://cdn.sqhk.co/defisepeniba/cjczjgO/tower_fortress_hack_apk_1._0._227.pdf
    • http://mamafiposorugul.sportsontheweb.net/51077276341.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kigasuwixiw.epizy.com/97680138201.pdf
    • http://maretubozewugi.myartsonline.com/lapuvobalabivufaxo.pdf
    • https://s3.amazonaws.com/kevava/85511953677.pdf
    • https://s3.amazonaws.com/godoremitiwuja/baldi_s_basics_granny_mod_apk.pdf
    • http://kesekerezox.epizy.com/49036275164.pdf
    • https://s3.amazonaws.com/xewamejixolefaj/apache_spark_vs_hadoop_performance.pdf
    • http://veraliw.rf.gd/tem_mode_in_rectangular_waveguide.pdf
    • http://bofutezexo.rf.gd/does_irs_recognize_common_law_marriage.pdf
    • http://tiriburud.rf.gd/zigeva.pdf
    • https://s3.amazonaws.com/xefejevife/how_do_i_unlock_my_sandisk_clip_sport_mp3_player.pdf
    • http://biburusig.myartsonline.com/expenditure_cycle_threats_and_controls.pdf
    • http://walefofu.rf.gd/48145858767.pdf
    • https://s3.amazonaws.com/xefejevife/chatrapathi_telugu_movie_songs_320kbps.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_off0000eb93.bin
9081f5f5e7b96c6517c72578346514077ba47f42261501f438625e523242d3ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB93 5644 bytes
font_01_sfnt_off0000fec3.bin
ee6f68af318b9ed9329477de4344014507f02e31ed508612ecb64299e9a5a93f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC3 12196 bytes

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