Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7eafa5a59f25f3…

MALICIOUS

PDF

41.2 KB Created: 2020-10-05 00:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: dc6b2951448aa70e2ee52b1de5bfc39a SHA-1: d09bec04fd43b25f115daba01668e5ab93360861 SHA-256: 8c7eafa5a59f25f3eb4c139f2bd17d0b8c2703a230d9b1e4150ea9794c4b9c3c
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=learning+how+to+learn+book+pdf In PDF document text
    • http://files.introphilosophyofmind.com/uploads/1/3/0/8/130813144/3eff7b8a.pdfIn PDF document text
    • http://files.adiyadoni.com/uploads/1/3/1/4/131437308/86302.pdfIn PDF document text
    • http://serunoxof.pelhamartfestival.com/uploads/1/3/0/8/130874422/216019.pdfIn PDF document text
    • http://files.mutouchfootball.com/uploads/1/3/0/7/130776735/5570fc297d.pdfIn PDF document text
    • http://sizitewor.gmpvitaminshealthy.com/uploads/1/3/0/7/130776083/suzuvubiginosifovil.pdfIn PDF document text
    • http://repunumak.m-agiostratitis.com/uploads/1/3/1/4/131407082/vurunewisuva_ximanibefifudu_bukiti_dubot.pdfIn PDF document text
    • http://samasesit.voodoocosmetics.org/uploads/1/3/0/9/130969080/8ddb5ec.pdfIn PDF document text
    • http://files.allyparks.com/uploads/1/3/1/6/131606789/giposuwudotub-jigojexapubu-sajijekomamom-foludajekam.pdfIn PDF document text
    • http://files.samanthamesserartist.com/uploads/1/3/1/8/131856191/7de11b9.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/1/0437/4721/3464/files/dublin_cross_country_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3405/7621/files/jafopuvezirepukusaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9449/9743/files/xiwukaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0151/0045/files/86643352243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/wakofevoxudebakena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2992/9377/files/76124386313.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B2 5360 bytes
SHA-256: 9a3273fdc6318a42b178b8c5d66b15b186f22d3961768222fc4cb696e71074ee
font_01_sfnt_off000074ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74FF 10252 bytes
SHA-256: 6eb0f04a00bb6b5349b8fedaa7c616eaa0798d41d081350f5269414f2e233319

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