Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a2824cd79bb00a…

MALICIOUS

PDF

84.3 KB Created: 2021-04-05 09:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4591c2e9b94467e76b6c6e9ab82e8249 SHA-1: b3cab668caf93d25562a5a561e8ddf47213f6e90 SHA-256: e0a2824cd79bb00a831cba4439d4794e47c5d18a257e9fe2815197842aee8b3e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple external URLs, including one directly linked to a Spanish definite articles worksheet, suggests a phishing or social engineering lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attack aiming to trick users into downloading further malicious 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://nipisod.ru/123?utm_term=spanish+definite+articles+worksheet+pdf
    • https://cdn.sqhk.co/tovisegag/zijOvtg/luniput.pdf
    • https://cdn.sqhk.co/nomitusibop/ghb0Ksw/amazon_fresh_trial.pdf
    • http://help-service-support.com/454999686754guvn.pdf
    • https://cdn.sqhk.co/lojewewure/i2fMhhi/sheetrock_dust_vacuum.pdf
    • https://cdn.sqhk.co/xidujefonari/f1Nm9je/bedwars_map_minecraft_1._12._2.pdf
    • http://ubsvp.com/4k_full_hd_video_player_apkteb4u.pdf
    • https://cdn.sqhk.co/buzosefif/bVhciqs/good_murder_mystery_books_for_young_adults.pdf
    • https://cdn.sqhk.co/ribobujir/yghEif4/sakonofimip.pdf
    • http://elinekici.online/what_is_the_most_important_idea_of_the_gettysburg_address2e30q.pdf
    • https://cdn.sqhk.co/pujixefan/jbujcli/vofamamibexofere.pdf
    • http://life50it.pro/viwuparatityokc.pdf
    • http://psylath.com/the_great_gilly_hopkins_movie_reviewmi7x5.pdf
    • https://cdn.sqhk.co/reruzemafow/hjgihg7/cannonball_run_2020.pdf
    • https://cdn.sqhk.co/gepeduvo/gggdia2/troll_adventures_level_22.pdf
    • https://cdn.sqhk.co/dusimefosix/iehfyhg/yandex_disk_download_pc.pdf
    • https://cdn.sqhk.co/xupodafib/c6YHfu4/hey_clay_aliens_code.pdf
    • https://cdn.sqhk.co/farafakilof/FgfjcLM/fewugaxofukujirojitizar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/debamijizozexo/the_norton_field_guide_to_writing_5th_edition_used.pdf
    • https://s3.amazonaws.com/dudurat/xobederu.pdf
    • http://jerananixakuzeb.epizy.com/surobajetomedir.pdf
    • https://s3.amazonaws.com/wewiro/95339478738.pdf
    • https://s3.amazonaws.com/vapelurowar/azar_for_pc_windows_7_free.pdf
    • http://nexofemexer.epizy.com/84558168159.pdf
    • http://muvidunijusen.rf.gd/hebrew_bible_names_and_meaning.pdf
    • http://fezaxakanopejux.epizy.com/vutulijukisilavuziw.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_off0000fcdd.bin
11348cb9a8bd5d8d2b4b5329894ffea1d127b86ba4e3cfb8d0f2ad960f084cc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDD 5288 bytes
font_01_sfnt_off00010ed3.bin
440087f57bf504c7ec9181ac42d03ee59bd139d12e83252863bedba46c10eeb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED3 11788 bytes
font_02_sfnt_off00013542.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13542 4324 bytes

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