Malicious PDF — malware analysis report

Static analysis result for SHA-256 418f99863653a8bc…

MALICIOUS

PDF

72.0 KB Created: 2021-03-27 20:01:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 319d956e9b2905488db15e448de70513 SHA-1: 23e9bcf6c9d758afe4e6bc85be032927ab38fa83 SHA-256: 418f99863653a8bcde0e7b32c1f0422c5e573d97ad3f71f05771a999684c54e7
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of multiple external URIs, including one that appears to be a download link for a PDF, suggests this document is part of a phishing or malware distribution campaign. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall pattern points to a malicious PDF.

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://botokaw.ru/123?utm_term=boom+shankar+song+free
    • https://cdn.sqhk.co/xelajuwodaf/hcpdjfP/61261026421.pdf
    • http://pay-order.info/napizubarejubonalu75834.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://muldwych.com/geometry_dash_2.1_apk_hack_mediafrejt1aq.pdf
    • http://rujewazaxijaza.sportsontheweb.net/cannibals_and_kings.pdf
    • http://lnstagram-helping.live/bedimekis1v1ek.pdf
    • http://pc-remont.website/the_great_depression_definition_us_historylw4ed.pdf
    • http://usblighter24.site/stephen_king_the_outsider_summarykxfrn.pdf
    • http://leqqurint.online/xonisario61m.pdf
    • http://devicesprotectionforusers.site/eragon_book_4_audibleqg4hs.pdf
    • http://ijmalan.xyz/ridgid_miter_saw_table_parts21fpy.pdf
    • https://cdn.sqhk.co/baxorurifina/gdhHicR/windows_7_keyboard_control_key_stuck.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jaxunukologefis.onlinewebshop.net/fyi_for_your_improvement_4th_edition.pdf
    • https://uploads.strikinglycdn.com/files/3d58e668-efe5-4e72-87ef-c03566acbc55/emerson_3051_datasheet.pdf
    • https://s3.amazonaws.com/tetofamuxulil/duke_fuqua_mba_placement_report.pdf
    • http://wegugoleta.onlinewebshop.net/will_there_be_another_book_with_percy_jackson.pdf
    • https://uploads.strikinglycdn.com/files/d3ae555a-81aa-4e29-8268-95b62a2a1b33/27773296152.pdf
    • https://s3.amazonaws.com/sagotomagin/6433486659.pdf
    • https://s3.amazonaws.com/divexikav/asda_sausage_and_broccoli_bow_tie_pasta.pdf
    • https://s3.amazonaws.com/zemunomipazikez/kogovubinupisabuneruruse.pdf
    • https://uploads.strikinglycdn.com/files/8bf37fd6-b536-4039-8074-0009904cf274/casos_de_uso_ejemplos.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_off0000daeb.bin
bdafe4b738a103764727532518ffcbefce91e3071881b7aab75a869d968006a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEB 5264 bytes
font_01_sfnt_off0000ecac.bin
2f6fb7cebe378b491e521fcb28c4a4bde5549d8c2f3b0667b9491a1797bf3c19
pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 11580 bytes