Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e61ea9625ca5011…

MALICIOUS

PDF

73.1 KB Created: 2021-03-12 09:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c2c75b4abb9bbc1f44bc1a967dd51749 SHA-1: 8bea1be176fa9120a8aa58105c360b087e2c199b SHA-256: 4e61ea9625ca5011b0012e8e5657224236b9da20c3ce8ac6f22b3d0041d6e5ba
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/award?keyword=primary+auxiliary+verbs+exercises+pdf PDF link annotation
    • https://lewesasegejawu.weebly.com/uploads/1/3/5/3/135315787/61d97cef.pdfIn PDF document text
    • https://kuzapulekoxiror.weebly.com/uploads/1/3/2/6/132681507/fapur.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/Viaibic/dokunumofesitowufa.pdfIn PDF document text
    • https://vafebukuwu.weebly.com/uploads/1/3/1/1/131163563/disojutujezi.pdfIn PDF document text
    • https://dorugemapakew.weebly.com/uploads/1/3/4/6/134680888/853961.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/JidiaZU/33975507053.pdfIn PDF document text
    • https://wegenagozej.weebly.com/uploads/1/3/5/3/135394478/8778968.pdfIn PDF document text
    • https://cdn.sqhk.co/bebetirifam/idfzhjI/my_talking_tom_download_for_pc_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwilaj/jjYAgfR/72905920444.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fe426b01-1dd0-498a-b08e-7ec37e320b94.filesusr.com/ugd/6b45f0_6df79e84708f4f3dbb7b55cb25dd0792.pdf?index=trueIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_e4914689e2ab457ea2d4cef34905696f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/59104842570.pdfIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_bb8afe8abff2496498b13049456c6e09.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pukiza/witam.pdfIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_cffcce9987e54a11b91d39ee073433e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1c78c2-cd0d-4ba5-a67d-9d1f51dac2a7/toro_super_blower_vac_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17f223ac-81a1-4ca4-98a3-4e5749e218b6/what_is_basis_in_solid_state_physics.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/shell_shocked_game.pdfIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_b3b7c6dbb05c469fa8e4cb1c0edf64a5.pdf?index=trueIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_fb50339464aa466f858ddcebfe24ac31.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c82a41d3-ea23-4d69-9bd9-ee5efaf35f31/is_my_epson_printer_airprint_enabled.pdfIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_27241b4dc165482f982d0e69859e47f1.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF9 5672 bytes
SHA-256: 224e2a7be8310d0f08b2e3163f4dc3f41bbc342c3675508f8d95497bd79e1334
font_01_sfnt_off0000f338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF338 10520 bytes
SHA-256: b925c033e8061b21ed620cd904e7a0115a326651b1c4a5a81454f8fa04974b24

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