Malicious PDF — malware analysis report

Static analysis result for SHA-256 441cb17016bab940…

MALICIOUS

PDF

43.1 KB Created: 2020-10-16 02:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fc75e2747564797cbc5f14dc0899d8e3 SHA-1: 5209bd7d3b814f7f3d5ada4796eeb8fffcb79616 SHA-256: 441cb17016bab940a8b1509e6609de34218aeae9970d8690bdd3d28a515c729b
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=everquest+shadowknight+guide+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f88c58cdb83b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f875321e0311.pdfIn PDF document text
    • https://site-1038422.mozfiles.com/files/1038422/39486057630.pdfIn PDF document text
    • https://site-1039721.mozfiles.com/files/1039721/48818544044.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/vitiregavoxofe-xaviferatavatax.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/motisizenure_wedunu_duteduxajogiw_majixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f88c2151a3fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f88bf1b8806b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f87020a88a02.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/1/0500/9571/8565/files/pukepogetudiwikeweribij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4081/5288/files/verb_lists_infinitives_and_gerunds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4355/1392/files/45907985912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7216/8351/files/33093761687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4207/3507/files/human_anatomy__physiology_10th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a109c769-526f-4817-93d1-39c8ae58f3d1/86703978727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bcdda34-5bef-4749-be92-2ca9126e1607/72812441485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36152360-836d-4101-ad42-cff122f34718/povivepowewinupogalarav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de103406-419f-4b40-ba14-3d414a61ea2e/38353382670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31b0672b-a60b-45c4-817a-d7915dc5c22d/75945600976.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_off00006980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6980 5628 bytes
SHA-256: 9a5513255b30ee14e7474de75c65478d1d7432395926367f08356c897a9e6578
font_01_sfnt_off00007cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBB 10060 bytes
SHA-256: 2b73517374acb5d5bb830d4ff74b91419545af71af8bf15fd4c89c188ae20d5f

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