Malicious PDF — malware analysis report

Static analysis result for SHA-256 99030e0458ab9f7b…

MALICIOUS

PDF

44.0 KB Created: 2020-10-17 16:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3ea335aa75142a1ab4540fbc324a5f87 SHA-1: 3b9cbabced988c930c22785fdea5e7a8b5d8bdc4 SHA-256: 99030e0458ab9f7b5bb9a1c4945fb44b8074da00ec39b0d90edbbf88a10ae8c1
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://ttraff.cc/123?keyword=epipen+jr+user+guide In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ramugimexixepaba.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/jabuvipeza.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/gosibokuvefuj.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/delelides_dasexurekiwar_jajumab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f8758fd9be14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5f87e189e48dc.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/loseluxabivulotopef.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/3ad130cd797d2.pdfIn PDF document text
    • https://vezorobabuwej.weebly.com/uploads/1/3/0/9/130969079/bowedigefuwexune.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/df0a3bffebe0.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/vurozit.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/3bb331e1-411a-4f16-b23f-8b75929834ef/butibotokiletolugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ba8c48-4cab-4472-9cfd-04cf1e559f73/nilebidowavikuzimegima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8357/2409/files/jivotezetirepiwosesisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9441/2963/files/ryobi_18v_hedge_trimmer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5281/3466/files/77282291834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4489/5392/files/63862052825.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_off00006fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAE 4920 bytes
SHA-256: 8729de108f28d55be123b3cb06e61449e3275ddf20b0d97f8d266739faf7a3fa
font_01_sfnt_off00008079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8079 10220 bytes
SHA-256: 548c75e3d149b95c985f6c05a0c3d3908a22c501995ff558d3dde777b3100dbe

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