Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c39ce59c3db221f…

MALICIOUS

PDF

42.3 KB Created: 2020-11-07 07:54:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 25cbbc802450614e231894628599bd73 SHA-1: 75873004eb2c9202ac7cff14f9138dfee96b8b4f SHA-256: 9c39ce59c3db221f3555a47bd078ede735feb54a002efde432f6655401373358
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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://traffmen.ru/123?keyword=game+company+tycoon+codes+2020+roblox In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/3409757.pdfIn PDF document text
    • https://kupujusurigov.weebly.com/uploads/1/3/4/4/134471221/raxusupelirozi.pdfIn PDF document text
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/sabok-guwadokekul-wagivomi-fosutogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vuxogomirus.files.wordpress.com/2020/11/bsc_agriculture_1st_year_notes_i.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/65548376527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/281dec6f-897d-43d5-9504-12666106e957/18596663165.pdfIn PDF document text
    • https://towuputuwome.files.wordpress.com/2020/11/tasibuxomipubomugeruze.pdfIn PDF document text
    • https://rabodelexeti.files.wordpress.com/2020/11/jisemerawaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af9f9b59-4cea-4f97-b6b1-3c8304db3c29/offensive_security_pwk_videos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9487e18-88bc-476f-b66c-1d9c3bbfc411/pidekedetesa.pdfIn PDF document text
    • https://rawurun.files.wordpress.com/2020/11/63434751621.pdfIn PDF document text
    • https://vefaxex.files.wordpress.com/2020/11/6346994850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d47d1e-4513-4a00-adfe-2ceac17fd10a/sibinumerabinisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97a5a049-d7fd-4d8a-8f59-59d885e56a09/saxerimozafufekakevupasev.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6371 5832 bytes
SHA-256: f4e0d61b637f9b5596747799f3ed067c9e728438e6519d1aac68432616d8a4a5
font_01_sfnt_off00007740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7740 10620 bytes
SHA-256: 4accdab4b7dad53e7c990e1a018a88bd0a93a547e9c3589ebed3c8b1fff2896b

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