Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c44ba97c8257cad…

MALICIOUS

PDF

44.8 KB Created: 2020-10-26 23:26:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: be924a61f94630382f0bf583e42655f7 SHA-1: 28c06e5d12408ed1688ad5d3131e6447a1f5875e SHA-256: 2c44ba97c8257cad319ec1a0bdd28a267fe24ec88b95be626cf6eb7c290793d6
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.cc/123?keyword=art+prints+basics In PDF document text
    • https://gekitudijelal.weebly.com/uploads/1/3/4/2/134265938/b2d2b5.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/nedovi-nidobufina.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/7266767.pdfIn PDF document text
    • https://soguleta.weebly.com/uploads/1/3/4/3/134305846/redunatodowopulo.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/7348375.pdfIn PDF document text
    • https://vimikipemaw.weebly.com/uploads/1/3/4/3/134331773/5297d73e61.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://cdn.shopify.com/s/files/1/0476/8982/6470/files/difference_between_plant_and_animal_cells_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2916/6242/files/cambridge_ielts_listening_test_4_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5875/2405/files/28800300709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8196/6764/files/how_to_calculate_kp_ki_kd_values.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5587/3190/files/t2pi_sqrt_l_g_solve_for_g.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6035/4968/files/pusilomevuzadixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5043/4211/files/zowowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2490/0515/files/ropepuzabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7088/4514/files/kawasaki_prairie_400_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2188/8409/files/intermediate_english_textbooks_telangana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/376ae905-3d4b-485a-92cb-de0ed296c03e/51288605981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f869c59-47f3-4276-b4d4-3083d1b65895/repimoximijalafuzolabiruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d96cd90-1d4a-4dde-8cdd-66992913231f/43234634464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e99a5c4e-b9bf-48d4-90f6-504a7685968f/82941400555.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DC 4584 bytes
SHA-256: 67a5b4d60e3b47d29e1c8dc8521b15b1a51aae6ae6dbbaabd6d5935bd6d61683
font_01_sfnt_off0000735a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735A 10808 bytes
SHA-256: 476c8a98c1543b8f7043962b345509fffb7e8c3b2aa606694ad9affce5595562
font_02_sfnt_off0000980e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x980E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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