Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c62bab19dcdef6…

MALICIOUS

PDF

79.4 KB Created: 2021-04-17 16:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5cb6d11e0fb04da4c549bb4e719230f8 SHA-1: 051464f3b6533374d0ce4e1c42bb871bdaeb1b5e SHA-256: 19c62bab19dcdef6217913caf3d29b857ef8c96d1cfbed8d79096414be96808a
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that appears to be a lure, masquerading as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=who+plays+elena+gilbert+in+season+9 PDF link annotation
    • http://tavafotuzefox.sportsontheweb.net/write_base64_string_to_file_java.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/74039193131.pdfIn PDF document text
    • http://pebonemariv.mypressonline.com/28905569357.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/iihgdhd/fonemejurike.pdfIn PDF document text
    • http://bukuxojunuz.mypressonline.com/seagate_goflex_home_default_ip_address.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/pifMhdy/boom_beach_base_builder_with_prototypes.pdfIn PDF document text
    • https://cdn.sqhk.co/bimepefav/bjcThhr/jon_boat_livewells_for_sale.pdfIn PDF document text
    • http://xijonofupawulo.mypressonline.com/july_calendar_2020_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/cjc6Kgh/vector_quantity_examples_in_life.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/on_the_historicity_of_jesus_richard_carrier_download.pdfIn PDF document text
    • http://kigirifaduguv.getenjoyment.net/vuvifujipirofupiga.pdfIn PDF document text
    • http://lesuxofozadize.mygamesonline.org/happy_birthday_piano_sheet_easy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dowavelaxam/42431211395.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/texas_instruments_ba_ii_plus_professional_target.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/the_secret_life_of_the_american_teenager_season_3_episode_11.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/65190590439.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/what_does_a_team_leader_do.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/blf_a6_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/tipos_de_comunicacion_en_la_empresa_coca_cola.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/av_player_ios.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2D 5280 bytes
SHA-256: b59679c254a65f4feb2b63e1eeb294fe65956a6e7ac6e4fce787a63f7c0f3db4
font_01_sfnt_off0000fc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1C 10512 bytes
SHA-256: 778dea3085ebd3a473b24abd86ab8dafba0c53b3603ee992148223b8d6f14427
font_02_sfnt_off00012010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12010 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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