Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f9675dca45a320…

MALICIOUS

PDF

39.6 KB Created: 2020-10-15 15:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 588d8fb1253024a9fcf4bf21421cc959 SHA-1: be9a48725ad9b1a6f277feb1002ec97e3eecd9e3 SHA-256: b4f9675dca45a3206782cd16f7dab3359507282d1ea6dc4ceb9eea23b8656610
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://ggtraff.ru/123?keyword=n64+emulator+android+download+apk In PDF document text
    • https://site-1038618.mozfiles.com/files/1038618/lobifuwalo.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/3724686.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/7228805.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zanadutut_wexudafenatogun_jetomefoja.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/a7b88.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/342536051de708.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/ff06dfdf.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/03f6cfe6d5.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/4975078.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7d3707d5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac9d1fdd-a804-4820-8f62-1a6f812a1c3f/72698873085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9216761c-38b6-44f4-b18a-c284558ee7ea/kedevugedonitawes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bce7a2f8-e5d5-4315-b44b-d9ae3a1c887c/mevifaziwebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5646a03f-1d49-4cb1-b1bd-8d747d1a9468/lizufisotududiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3be18082-5b62-47b7-99ed-3b6bfdbe455f/30809480291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8812/7160/files/fifuzisonogula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7009/5011/files/tabametedufuzidarivefedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9243/4326/files/lutizovitanijerimito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5962/6655/files/list_of_amino_acids.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6564/6999/files/67150368469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/easy_substitution_problems_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7075/8805/files/kristy_mcnichol_today_2019.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_off00005ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCC 5296 bytes
SHA-256: e542feb645e7597cc1321101229d0e2600721de107226b23411a0aac7046e218
font_01_sfnt_off00006ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECF 10004 bytes
SHA-256: ac3be5c21cf6d952437997e3c0a6b1467fadf6c39be2684ae7445cccd8030991

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