Malicious PDF — malware analysis report

Static analysis result for SHA-256 4683594d63c89d38…

MALICIOUS

PDF

61.7 KB Created: 2020-10-02 04:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7dbac1ab97ca2b52d9c855dbfe620502 SHA-1: 2c84a6528a09b4bc915e31c0a8594f77147144bc SHA-256: 4683594d63c89d3825fd3275664488d0df48333dd83bf46a92c4eb22d7c66d64
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://ttraff.club/pify?keyword=heart+of+darkness+study+guide+answers+part+2 In PDF document text
    • http://kereke.emilyveneresquire.com/uploads/1/3/1/4/131453329/84f641db5f08f8e.pdfIn PDF document text
    • http://files.europeanwoodworkers.com/uploads/1/3/1/4/131483254/wuniwizoz-movadufex.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/aa21c65c-bcad-4133-ad9b-cb29e27aa607/fobowoworebizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51436c4-b2f9-448c-848c-34f7861ecff3/74287997960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d11765a-a199-4a9f-9a1c-bc0abac55432/legelefefavatitimazetok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cff8be0-a71f-4650-9484-75bac415c3c4/sepevumekirukiral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/603221e3-a3c0-4c30-bbf8-6859b8750786/81876998350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/mozinawezajet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2547/1400/files/racing_junk_trailers_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6262/3397/files/orbit_lawn_sprinkler_timer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/460655425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/31745862735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f6c1517-1ac9-41aa-8edd-a195644eb6d9/vitumisetekezixafab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/205018bf-94a5-4270-975c-edecbde8d1c9/lexodofepisuzizob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86f2e51-4580-4b42-bd3a-3d362b39e8c9/wevamunurodisokepite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50862794-b00c-4d7a-9297-4ee18a77c815/58328802515.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000961c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x961C 5528 bytes
SHA-256: 9de93dd9ef82375a6be79014e1e03c290f2e782b47d959ea8e7d2d94675900d2
font_01_sfnt_off0000a917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA917 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000b1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A3 9732 bytes
SHA-256: 22200ca7cb67cf37076f289e716bca1816ed9c73af58a51f4a12f122da7b33c9
font_03_sfnt_off0000d31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31F 16376 bytes
SHA-256: 069f5cdcb972b33999f3dc18a3e5b847fc2aa024b7c5b45b4734cedf253a8e5c

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