Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bf2c3ee5408e292…

MALICIOUS

PDF

49.9 KB Created: 2020-10-02 13:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 57718a00e25a6c79b5e577fc012ae9ae SHA-1: f9117579dae5dc22041509575fbb4c009e1e039c SHA-256: 4bf2c3ee5408e292c04144bfce3b028885ad5c006c62d9979f631e4d89de76eb
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://gettraff.ru/strik?keyword=chemistry+unit+conversion+problems+and+answers In PDF document text
    • http://files.lutateacher.org/uploads/1/3/1/0/131070806/7fab1dcd70f88f.pdfIn PDF document text
    • http://files.galwaygallery.com/uploads/1/3/1/4/131453241/juzigevirefitikiku.pdfIn PDF document text
    • http://files.stevethenaturopath.com/uploads/1/3/2/6/132681409/9519138.pdfIn PDF document text
    • http://files.arvidsonconsulting.com/uploads/1/3/2/6/132683292/9193707.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/23897b49-a294-48dd-95fa-d66409feb284/sukuvijaxogopezotozofomub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba8f05a-af15-43a1-ae6c-c3908d0bcef5/nodudena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a281bbd-8ea1-4deb-8b98-4e6f055907d2/lagol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4945/1161/files/84134214515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9599/0175/files/gajamokid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7806/5059/files/79856613405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3657/6414/files/76861376058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9905/8073/files/vatepebezobotidovajozif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/jurosufiko.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7621 5612 bytes
SHA-256: db6720f625f06aebdb2cd33037df4de6afb4da0da77d5bb66748cf16dd83cea1
font_01_sfnt_off0000891c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x891C 10240 bytes
SHA-256: c129636a11108f4c15c5eb77ce5eef28eeed1626713930110516a04bc2c07d07
font_02_sfnt_off0000ac15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC15 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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