Malicious PDF — malware analysis report

Static analysis result for SHA-256 897887b6cda0778a…

MALICIOUS

PDF

84.8 KB Created: 2021-03-23 00:10:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cba660c3f522c36442b40141c8b20e96 SHA-1: 29d329a31eecacbb01527a6b772e12884ef2fa32 SHA-256: 897887b6cda0778a43e658beb2b44462b5c314473a8fdb2fd345c617c8a6121e
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'https://golowaki.ru/123?utm_term=simplejdbctemplate+batch+update+example', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to programming examples.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://golowaki.ru/123?utm_term=simplejdbctemplate+batch+update+example
    • https://cdn.sqhk.co/dufubimaru/ajahgji/photo_apps_with_color_touch_effects.pdf
    • https://cdn.sqhk.co/tefulobesa/i9hhgIc/balatumijumib.pdf
    • http://zespodsvetkoy.site/easy_christmas_carols_piano_sheet_music_free0fgt4.pdf
    • https://cdn.sqhk.co/xeloxilava/giZUjgi/assistant_professor_jobs_electrical_engineering.pdf
    • https://cdn.sqhk.co/futidiwe/HMjbiib/tuvoz.pdf
    • https://cdn.sqhk.co/zukasedu/gcBgggH/unicorn_dash_2012.pdf
    • http://stickerrus.ru/what_to_put_on_resume_for_skills8o9rd.pdf
    • https://cdn.sqhk.co/pigajifaw/iSjbiib/ball_sort_puzzle_level_107_hint.pdf
    • http://teren.fun/garmin_gpsmap_64x_handheld_gpssumme.pdf
    • https://cdn.sqhk.co/surodamiz/ibXjbig/escape_room_game_confusion_2.pdf
    • https://cdn.sqhk.co/wirowanorax/sNtgfjf/jumia_black_friday_kenya_2019.pdf
    • https://cdn.sqhk.co/potebuso/hhdjfgh/newcastle_top_scorers_premier_league_all_time.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5999cfcd-63ce-4fe9-b627-3b6cf77e4c23/how_to_focus_celestron_astromaster_90.pdf
    • https://uploads.strikinglycdn.com/files/9f03fbd7-37a4-486e-a052-3c35a69fe861/49137658522.pdf
    • https://uploads.strikinglycdn.com/files/e202a7aa-3ef1-418f-8f5e-00e1d5c42090/44613224799.pdf
    • https://uploads.strikinglycdn.com/files/cc49bf5f-ed91-4b20-9cdf-848ca8db1e2c/99929168095.pdf
    • https://uploads.strikinglycdn.com/files/8c03e51d-e4db-4939-8cae-e7642ccb069c/probability_and_statistics_with_applications_a_problem_solving_text_second_edition_2015.pdf
    • https://uploads.strikinglycdn.com/files/9894d082-c519-4cbb-a780-12b1b894c1eb/chrome_flash_player_plugin_android.pdf
    • https://uploads.strikinglycdn.com/files/aa2ae66b-818d-4193-bdb9-74a59b501661/47688967431.pdf
    • https://uploads.strikinglycdn.com/files/45d7f758-ca68-43d6-8c25-2846964ea120/14766948579.pdf
    • https://uploads.strikinglycdn.com/files/de10bdbd-e707-4e43-aa82-7717d0677657/lariverifonep.pdf
    • https://uploads.strikinglycdn.com/files/c71c229f-c31a-47bd-99e7-ebb8019aba0a/57063878300.pdf
    • https://uploads.strikinglycdn.com/files/972afd97-bd19-4790-ac5f-2caba2d68ca0/cunto_dinero_se_puede_llevar_en_avin_a_estados_unidos.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_off000109eb.bin
28f6265a9ffeba89140c468edac07d6137c231e707ac042e82b95600f1941c55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109EB 5428 bytes
font_01_sfnt_off00011c3c.bin
1c4442e1ee3afd504999c020496dc30a549ccf7ca84ee086a8c0011aad43a97d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3C 12064 bytes

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