Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24f0f46d10a4fce…

MALICIOUS

PDF

79.5 KB Created: 2021-04-15 11:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6585df78349c1637ddfde8bfa858f105 SHA-1: 2bb0f5bce5f8cbb9a9593844033fec9fb726c9cf SHA-256: c24f0f46d10a4fce3d2c569b3c5238f1bff27a4f4273a96e00374c03fe4e0b78
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a lure related to the criminal justice system, directing the user to a malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is likely used to download a second-stage payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/strik?utm_term=role+of+the+criminal+justice+system+uk
    • http://natfreshik.fun/56524315244dugts.pdf
    • https://cdn-cms.f-static.net/uploads/4487641/normal_602494dc50ad6.pdf
    • https://cdn.sqhk.co/bejomewuv/ujc4Ejb/ultimate_general_civil_war_union_battle_list.pdf
    • https://cdn.sqhk.co/dufukeraj/cjtgeOc/leather_messenger_bag_with_guitar_strap.pdf
    • http://opendouche.xyz/usmle_step_1_pass_fail_sdnl1eac.pdf
    • https://cdn-cms.f-static.net/uploads/4492245/normal_603a7be042b63.pdf
    • https://cdn.sqhk.co/gizetinediz/tMijgvS/beats_updater_will_not.pdf
    • https://cdn.sqhk.co/remimidotomi/cUhedxc/vurixefuzalilej.pdf
    • https://cdn.sqhk.co/kukisigafumi/gcRHggK/dashlane_free_password_manager_app.pdf
    • https://static.s123-cdn-static.com/uploads/4420915/normal_5fce338c52fe9.pdf
    • http://cashthe.ru/78417346205lmjnz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kudefem/kiwunixufulisanujakir.pdf
    • https://uploads.strikinglycdn.com/files/09d5e3ea-09dc-4efb-bd53-a4a8345dd217/34674594235.pdf
    • https://s3.amazonaws.com/dudigonifu/gorepuwijitijusute.pdf
    • https://uploads.strikinglycdn.com/files/36cc5b8c-552d-44f5-b028-bde7a190969c/13607088313.pdf
    • https://s3.amazonaws.com/wizuluworafid/8_team_baseball_schedule_template.pdf
    • https://uploads.strikinglycdn.com/files/11b9f4bf-b1e2-48a8-ae43-b6d308010553/jifogulifudatejazimunat.pdf
    • https://uploads.strikinglycdn.com/files/67ba7fb2-3449-42dc-8690-0682a140870d/how_to_use_greenworks_pressure_washer_soap_dispenser.pdf
    • https://uploads.strikinglycdn.com/files/894e3b37-a883-4b38-a86e-caadac6ca7dd/83188741524.pdf
    • https://uploads.strikinglycdn.com/files/f2e5e1fb-2094-4871-a20a-fdafd36dd4a7/adobe_photoshop_cs4_books_free_download.pdf
    • https://uploads.strikinglycdn.com/files/8e2802a5-b169-487f-8b4d-c2f1a9b06f97/padi_open_water_diver_manual_knowledge_review_2_answers.pdf
    • https://uploads.strikinglycdn.com/files/3ab0ec6e-6c5e-4660-98fc-b598f1597acc/pilofu.pdf
    • https://s3.amazonaws.com/tokatefozude/jabenifu.pdf
    • https://uploads.strikinglycdn.com/files/534f5aa3-0f2b-4cd8-a86c-ebd8db34a191/49740185371.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_off0000f873.bin
c306fb18102687f4471282601035ec57e847ff9603e57b4cd008f62386702d51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF873 5368 bytes
font_01_sfnt_off00010a9c.bin
4ba0b4fba48662ae50e16f6ecdb6f2dbd34bf91263fe3980c397f4a1e574440d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9C 11276 bytes

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