Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d8af941691ec9b…

MALICIOUS

PDF

43.9 KB Created: 2020-10-16 07:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bc5157ba1f176c042be0886889843714 SHA-1: 0c53872992a4777b95fed143c8a592e98de067f3 SHA-256: 90d8af941691ec9b1952429e9fa28afc4edbbb85fa80f3a2989b8c3041c9e7d6
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://gettraff.ru/123?keyword=brawl+stars+hack+apk+15.169 In PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/6583853.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/3250b5961ed1.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/192c3f8041e256.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/bfdba3fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f8764a864996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f88860b5c461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5f880e0aa5060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f88b294bddf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f88b0dfe939a.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/1648062.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/6658489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f88add715c1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f890983dd4b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f88f5d9520cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f87e5fc9cd30.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/3373854.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/gejuramowed.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/ec5b801.pdfIn PDF document text
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/43632d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4309/3142/files/ufo_vpn_paid_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2575/5043/files/world_cancer_day_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7629/6614/files/55391097782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0597/5462/files/tozesix.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_off00006bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDD 5744 bytes
SHA-256: 4298ce9c51edd74df0fc08bbca850d114da69baed145a0bfdb13169bc63bc0f5
font_01_sfnt_off00007f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7B 10120 bytes
SHA-256: 9845cf2a8ca46d6f2e0d509c47bbe1f78b1ac4301b1737209c3ceb08dbaab7e8

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