Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a69619c193263b3…

MALICIOUS

PDF

77.5 KB Created: 2021-04-01 01:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 638c3c872a2657c32834d4b8afc2d781 SHA-1: a32b7fb1bce66f2d72490ebac45715a872ea843a SHA-256: 8a69619c193263b38f0ab0054f12e992814ef44cbbf01ba6b2dce2cd04d0e5e5
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result for educational materials, likely intended to trick users into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of external URIs suggests a downloader or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/award?keyword=cambridge+igcse+mathematics+core+and+extended+fourth+edition+pdf+download PDF link annotation
    • https://cdn.sqhk.co/jugemito/cjjshbt/chinese_fishing_boats_north_korea.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafuzivega/ehh7V5a/juxutanopupibenuxutiv.pdfIn PDF document text
    • https://cdn.sqhk.co/jajotulix/difjinA/fuwojigovawu.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/irGjbja/xubagefesuxasulegafarutut.pdfIn PDF document text
    • https://cdn.sqhk.co/kisereta/Ciajc0c/2048_pokemon_mega.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/Azhghha/53613178640.pdfIn PDF document text
    • https://cdn.sqhk.co/fezemepusap/OFOjjev/pba_bowling_playoffs_tv_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/iejdifV/virtual_families_2_depressed.pdfIn PDF document text
    • https://cdn.sqhk.co/woxiwovar/gfSVyGR/49499911795.pdfIn PDF document text
    • https://cdn.sqhk.co/gevanadu/bgghdjd/name_game_song_ahs.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/sicsjc9/28843165426.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/can_sex_offenders_stay_in_homeless_shelters.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/can_i_use_normal_sd_card_for_ps_vita.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/free_printable_fax_cover_sheet_word.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/anaemia_in_pregnancy_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/how_to_make_a_bar_graph_in_excel_using_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b4124a-6dbe-4596-8898-f464a264ebb5/30260502991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba36542-9007-44a6-a62d-5e6786b16c64/thule_bike_seat_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/90399065392.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/what_does_it_mean_to_be_life_ready_college_ready_and_career_ready.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69C 5772 bytes
SHA-256: 131261667417874a1c3a94e3b8e0717bb7d4b49a83d2995525db528e4a534fed
font_01_sfnt_off0000ea28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA28 12380 bytes
SHA-256: c1641137700fe44e9730c7feeb7e7b3254387715d8347f341c3dbcfc1c04f067
font_02_sfnt_off000112a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A1 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1

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