Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a5123263216936…

MALICIOUS

PDF

55.6 KB Created: 2020-11-09 03:45:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 228d4ee7ca9d6f696d7ecfd538e43362 SHA-1: b75316f00dd4a3e6afe3e419f08d946e91db1bc5 SHA-256: 63a51232632169365e4e3cdce9e395a5ace41ccd7ee78a8e030cf0d80a7eeeb3
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafffi.ru/123?keyword=duo-therm+rv+air+conditioner+parts+diagram PDF link annotation
    • https://fomukudir.weebly.com/uploads/1/3/4/4/134403856/4632692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_5f8a796a25f7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448343/normal_5fa4c54cc4445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389085/normal_5fa89ef02d910.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://kidubudelojo.files.wordpress.com/2020/11/jolimafibuvuwujojav.pdfIn PDF document text
    • https://xekegaxasal.files.wordpress.com/2020/11/molagizogagez.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/solofufo.pdfIn PDF document text
    • https://nuzobelesuli.files.wordpress.com/2020/11/advanced_pixel_apocalypse_3_unblocke.pdfIn PDF document text
    • https://linexelak.files.wordpress.com/2020/11/om_gan_ganpataye_namo_namah_anuradha.pdfIn PDF document text
    • https://xefosoxawa.files.wordpress.com/2020/11/break_even_analysis_in_management_accounting.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/parentvue_cusdk8_org.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/nozemapopumetuve.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_off00008a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A71 5428 bytes
SHA-256: b8fc4af8e3ab540a2837ed1c0ca060d2922a9a1aaceeb2c1647c0bdcb42cffff
font_01_sfnt_off00009cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD1 11268 bytes
SHA-256: 79fe060430c9fbd47b737b6b46db0308b2a37fc4cba281fbfdece36876738e12
font_02_sfnt_off0000c318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC318 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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