Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb323de3996a3d18…

MALICIOUS

PDF

46.2 KB Created: 2020-09-29 20:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a830c8d2e91d2024ff8be806e0fecbd4 SHA-1: adc80f66f51609d6bc9cf2f2dc9bd74a287556dd SHA-256: cb323de3996a3d189554d684deb986f9421b66bb0ee27646339b65be3ee62919
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=icao+annex+2+2018+pdf In PDF document text
    • http://visajufar.bradfordarmsbc.com/uploads/1/3/0/8/130874691/nizud-lixogetezi-jumesigiwud.pdfIn PDF document text
    • http://rusedaboz.frackfreefoothills.net/uploads/1/3/2/6/132682137/ef051fe87e.pdfIn PDF document text
    • http://files.scurowatches.com/uploads/1/3/2/7/132740250/ce4c69.pdfIn PDF document text
    • http://dusiso.perfectcentral.net/uploads/1/3/0/7/130738705/0d640c.pdfIn PDF document text
    • http://sepawe.palestine100.net/uploads/1/3/1/6/131607203/7355890.pdfIn PDF document text
    • http://files.storge.org/uploads/1/3/1/6/131606011/83059.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/1/0432/7407/6315/files/adjectives_to_describe_sight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6421/4175/files/tikumupimilejapobad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8634/7417/files/tidutogapafemegozaben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/trauma_life_support.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8561/8583/files/81986460922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f170a96d-9942-4810-87d9-c41914087d18/wuxisawurijez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db92760f-5dc2-444d-adfe-fae6e2df59e9/teruwen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d23b5e1-2b49-489c-8532-dc0add57adb6/pesetuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e11750c2-7694-403a-833c-17b491824d16/35217277285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c40a57-482f-4ed2-9877-0f352a4a97f2/20264460359.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_off00004ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED5 5368 bytes
SHA-256: a5a03b48ac2d21baffb480d505f665d3ca17499654e2a58fbb5f0054ac9a25ed
font_01_sfnt_off00006139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6139 1772 bytes
SHA-256: 40f1e52a00a622c4134166ec990324e537a88d5bb9ddb36245c6b27edce5af9d
font_02_sfnt_off000069eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EB 13224 bytes
SHA-256: ea59207daec296f3e8ffe75a79dfca04f668e7e10fb0a283e788acc3856186e2
font_03_sfnt_off000093e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E0 16480 bytes
SHA-256: 37564169e6e472f70dcc20fbeaa0cb085cb7163636e1d825e5080ee45426d5b6

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