Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1afdca45176021…

MALICIOUS

PDF

68.5 KB Created: 2020-10-20 21:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: e392cbcd0a43c8ea558ce81f50fc9f2e SHA-1: 800347f85e2cafc8796b0f48223f0783d144a4d9 SHA-256: 1c1afdca451760217344376dbe440f781af113338d48c9892bad964f61ecd384
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/pify?keyword=root+cause+analysis+handbook+abs+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369784/normal_5f8b9242dc81d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f871ba386297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f87a56ca7def.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5f8abe9fcd77c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5f890d6f5708b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f875b9e9f634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8e5c05976f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387918/normal_5f8d4e92f11da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f8cc474a3aa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f8765802a896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387922/normal_5f8d895640270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f881726f0014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f8b19fdf3467.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/natabibekozovomuso.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nukunuraki.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/2507513.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/4182827.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/8970623.pdfIn PDF document text
    • https://fulugive.weebly.com/uploads/1/3/0/8/130874350/sepolefidogutug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000bed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED8 5460 bytes
SHA-256: d2509f06ef8689b443a7dc021b78908443cec7ac0e22d731f836767b7ae253a1
font_01_sfnt_off0000d16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16E 16964 bytes
SHA-256: d99a35068bf8d1ac8c343e259e28f7138ae8b47f7dda42ad2b574fea802bcedc