Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5246873257b295…

MALICIOUS

PDF

44.9 KB Created: 2020-10-05 11:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9181a4974cccd42b9c18d937dc259f09 SHA-1: 730685761c680f775c5fabbdcd83aeb2ef3b5073 SHA-256: bd5246873257b2955024d0e3a40382ff20e4aec9631c47863644b8099ad1dbe3
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=sports+world+ielts+listening+answers In PDF document text
    • http://faxite.jeremy-dodson.com/uploads/1/3/1/8/131856554/nunonivitamivizirer.pdfIn PDF document text
    • http://files.clocks4classics.com/uploads/1/3/2/6/132695805/e421c55de540a4d.pdfIn PDF document text
    • http://files.photonlasery.com/uploads/1/3/1/3/131379205/5167723.pdfIn PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/64645570907.pdfIn PDF document text
    • https://site-1037145.mozfiles.com/files/1037145/zasimax.pdfIn PDF document text
    • https://site-1042354.mozfiles.com/files/1042354/38838373931.pdfIn PDF document text
    • https://site-1040221.mozfiles.com/files/1040221/41458865044.pdfIn PDF document text
    • https://site-1042738.mozfiles.com/files/1042738/mipetunuvivaxuwagirivino.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://uploads.strikinglycdn.com/files/a512b731-3271-4952-bca5-2b25c469406c/guperumijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c902ed09-526d-4d0c-add8-0172daf20697/fokisifusini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66184ab7-0231-473a-829c-53eda2643e8e/lasufisovinebodavaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89c068d6-1460-47f3-a9cd-a45328e3bf56/kuvevodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f6eb29-2dc4-4af4-9b35-a97699ef975e/gatuwokofenerunus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e308024-fc5e-45c0-9465-289f7cdecb34/1212207341.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_off00006364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6364 5112 bytes
SHA-256: af775a35d895e84790eb32f95371757d1fd6b9dcadcad5cfbad129a03704fe0b
font_01_sfnt_off000074d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D9 10908 bytes
SHA-256: 84a9eed8eed9aa8fd805b8cda63a3e4d5a438ca2352268a80dfd1c30a1ea2bbf
font_02_sfnt_off00009888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9888 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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