Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27fc2b691786c16…

MALICIOUS

PDF

44.7 KB Created: 2020-10-16 13:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ed1b568970e7d4d78582d91b71f6f9fa SHA-1: be7867e2688dfbe0ba06851cf6c3eaa30fa83c71 SHA-256: b27fc2b691786c162842024ced1f281a7809ab0b961568118401ec3af8b00ae4
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://cctraff.ru/strik?keyword=tomorrow+will+be+better+book In PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/wijilefamivibufu.pdfIn PDF document text
    • https://defelewag.weebly.com/uploads/1/3/2/7/132741475/zazoxofuvabas.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/sedomu_tetas_fijenif_malonakafeli.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/93049f265a0000.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/767975.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/revun.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/5c4dfafadeb37ec.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/2479644.pdfIn PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/94b63f960.pdfIn PDF document text
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/boxabefi_jamerigejasiv.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/1/0501/1750/9274/files/golden_corral_modesto_ca_hours.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3968/4256/files/gegojozorizexobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8177/0163/files/family_guy_through_the_years_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7024/1953/files/optical_illusions_art_lesson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1518/4295/files/77892578283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0121/1809/files/17169289293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1216/1175/files/xuxopogoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0278/9539/files/moto_x3m_winter_unblocked_weebly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d72edce-6c86-453e-8192-9880f6fbec9d/20632316280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d9b92a4-3fb9-4778-9bd9-41de83b9f8da/tixexupiseforixutevif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d47a5a-c04e-45fc-ba02-1e6c29fe4e62/95769791616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f64e10c-13f6-4f11-9ee2-65ffcee43ce9/44537831449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31cb5878-ef36-49e0-a9e3-a2d26702ab14/gejuvu.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_off000072e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E3 4688 bytes
SHA-256: 135cb0a1c020c9af6d68434ebf333cb4d689fd2902c5d050e186d504e09aa612
font_01_sfnt_off000082d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D3 9968 bytes
SHA-256: cd454c858ef3aca9be5f630d04aa6bc79eb6ff17bae3efb473c479a59393bd35

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