Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03f3873b51e901e…

MALICIOUS

PDF

83.2 KB Created: 2021-04-02 17:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14a4a1091e2f946d0c86ebf3e8235723 SHA-1: 956576b5558d182c5344004ea691bc7db3f3b426 SHA-256: d03f3873b51e901ef2b318f6a4d55f2026759fa405e1fd2dda68c3e8ea90cad2
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 high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'formula of ionic compounds worksheet answers', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/wix?keyword=formula+of+ionic+compounds+worksheet+answers
    • http://ritefajitexu.scienceontheweb.net/binugabemuletelobopos.pdf
    • https://cdn.sqhk.co/lekibefefu/dhehiiW/spectrum_dream_2d_pixel_platformer_games.pdf
    • http://maladametugal.iblogger.org/kosenemipiduwenoxabevir.pdf
    • https://cdn.sqhk.co/bijukipuj/djaojdn/61572556654.pdf
    • http://runexutofo.iblogger.org/les_4_accords_toltques_rsum.pdf
    • https://cdn.sqhk.co/jaxabofapuw/jbridOc/kowokojajesejaga.pdf
    • https://cdn.sqhk.co/wusoxopejezo/g49JhHL/juganiwa.pdf
    • https://cdn.sqhk.co/wekaradukuve/Id3gigg/arena_goggle_case_orange.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zifozujiwi/motorola_talkabout_250_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/dbf00056-90d6-4e51-b31e-a291609c1e2b/how_many_rounds_are_there_in_infosys_interview.pdf
    • https://s3.amazonaws.com/zumezeviwakiz/adobe_acrobat_professional_trial_version.pdf
    • https://uploads.strikinglycdn.com/files/454e7674-c174-4557-ad9c-3d5549f76233/brother_mfc-7340_printer_drum_error.pdf
    • https://uploads.strikinglycdn.com/files/a4c4f98b-b1fd-4de1-a5bb-11e56d991361/replacement_parts_for_kenmore_dryer_near_me.pdf
    • http://supajiwa.myartsonline.com/fingerstyle_tab_books.pdf
    • https://uploads.strikinglycdn.com/files/c1006970-3c53-4890-bb83-d36d7215deb7/lekejutufonoza.pdf
    • https://uploads.strikinglycdn.com/files/ddd054bd-5d62-44c9-abaa-7faa2727bff7/husqvarna_372xp_x_torq_price.pdf
    • http://bifiwapaz.onlinewebshop.net/how_to_put_a_zebco_33_back_together.pdf
    • https://uploads.strikinglycdn.com/files/a0996311-5e2c-4db6-bef8-92a62333ed5e/will_there_be_a_series_9_of_game_of_thrones.pdf
    • https://uploads.strikinglycdn.com/files/8b2eedf7-327c-440f-9e54-63415b5ee378/41164602117.pdf
    • https://uploads.strikinglycdn.com/files/f3357281-2ec6-4f55-aa7c-27a1d37b0e90/zigopiguna.pdf
    • http://dimebuturerab.epizy.com/2463508964.pdf
    • https://uploads.strikinglycdn.com/files/b9189da4-34cf-4b20-a5f2-bff1bf970bdb/why_wont_my_hp_deskjet_3755_print.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_off0000f708.bin
17a100ef6a1ea28b8e765bd33be2d7fdb3f491660222385f8c79ab996ae2022e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF708 5388 bytes
font_01_sfnt_off00010940.bin
3c613cc31d66b2509c757cd7574cf776b4ef066a12a04ce4b2bd6b582262ca0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10940 11872 bytes
font_02_sfnt_off00013118.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13118 4324 bytes

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