Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc21515dbf68d571…

MALICIOUS

PDF

79.3 KB Created: 2021-03-15 10:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b34f81d7fd20fdfeb1fa3dcf5ec7e4e5 SHA-1: ec472ae20e07f18e4f9d98f292c70689af8fcba8 SHA-256: fc21515dbf68d5712fa6ae2cf92faa59260449a949e708bb2dcff703aaaa3c52
136 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a "hack tool" for the game Marvel Future Fight, which is a common lure for phishing or malware distribution. The document body, though heavily obfuscated, contains this URL and other PDF metadata. The presence of the PDF_URI heuristic and the ML_NYX_PDF_MALICIOUS score strongly indicate malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ponafet.ru/wix?keyword=marvel+future+fight+hack+tool+2019
    • https://cdn.sqhk.co/xemugugafot/Z6Xlihx/55802722758.pdf
    • https://cdn.sqhk.co/kikolibub/cYhahfW/bluestone_patio_installation_cost.pdf
    • https://cdn.sqhk.co/jobezivozuf/XYhfaOu/red_potatoes_green_under_skin.pdf
    • https://cdn.sqhk.co/sitosuduf/gfhbjjo/music_player_app_for_pc_free_download.pdf
    • https://cdn.sqhk.co/faxinomitux/EgeidKd/top_tik_tok_songs_2019_list.pdf
    • https://cdn.sqhk.co/kukisigafumi/VjaqR5G/free_online_radio_stations_90_s_r_b.pdf
    • https://cdn.sqhk.co/mewivupa/jcifheb/my_boy_emulator_apk_mod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xumakomowi/a_song_of_ice_and_fire_illustrated_edition_book_3.pdf
    • https://s3.amazonaws.com/mefovu/nulalur.pdf
    • https://uploads.strikinglycdn.com/files/43aa1e42-0140-48a6-871f-7d22babccbbf/94042433539.pdf
    • https://uploads.strikinglycdn.com/files/a5bd4e0b-0082-4366-a86b-11f0f620aae8/marx_communist_manifesto_summary.pdf
    • https://uploads.strikinglycdn.com/files/31968850-91d3-4e84-ba12-c49ef5a78a8b/58382346478.pdf
    • https://uploads.strikinglycdn.com/files/695b860f-e676-4b5d-a8ca-20ae96ed27ea/zosakobuxiwoge.pdf
    • https://uploads.strikinglycdn.com/files/77d092c4-da55-42c7-8c6f-7da55460afac/windows_server_2012_unleashed_by_sams_download.pdf
    • https://s3.amazonaws.com/gavapozalilup/mawarufuwiwu.pdf
    • https://uploads.strikinglycdn.com/files/32b1519e-b025-42b0-b382-13d8469c38ea/dofagamede.pdf
    • https://uploads.strikinglycdn.com/files/9b4d6fc6-da12-423b-a7aa-2fbac5fb5e42/is_red_cross_test_donors_for_covid.pdf
    • https://uploads.strikinglycdn.com/files/5441e0b4-f1bf-4d47-b456-de9cea3199ab/falured.pdf
    • https://s3.amazonaws.com/filidabut/ending_sound_worksheets_for_grade_1.pdf
    • https://uploads.strikinglycdn.com/files/7eaca525-d8da-49b5-89ee-e7fbdb70954e/flavorwave_turbo_oven_recipes_chicken.pdf
    • https://s3.amazonaws.com/supefujoxopubu/elite_platinum_pressure_cooker_parts.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_off0000ebb7.bin
19db361b666b532abc5714b5da92e254836aecbd1b75bba085574799549ef472
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB7 5352 bytes
font_01_sfnt_off0000fe16.bin
9a246cc56265ebf81aa90f0d486b00aa5b9c7f41bc9ecc643fe2765b00622f85
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE16 10480 bytes
font_02_sfnt_off000121a7.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x121A7 4324 bytes