Malicious PDF — malware analysis report

Static analysis result for SHA-256 033042df618772cf…

MALICIOUS

PDF

49.7 KB Created: 2020-10-10 04:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0a3fc2fb349c312c658571037a8f1cb3 SHA-1: eec8817fa4e7e1581a839019fc54a40e6ff9c83c SHA-256: 033042df618772cfdbd8bd46e8d3685bd96546d2e0bf24ea450507c68feb682f
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=ap+human+geography+midterm+review+answers In PDF document text
    • http://sowus.blumink.com/uploads/1/3/0/7/130738720/902c7d3c6.pdfIn PDF document text
    • http://files.mindandbodyfitnessaus.com/uploads/1/3/1/4/131437474/d6760e8515.pdfIn PDF document text
    • http://files.discoverbellville.com/uploads/1/3/1/1/131164079/nupavu.pdfIn PDF document text
    • http://zuxakatab.stockdissector.com/uploads/1/3/0/7/130776458/adc06ab4181aaa.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/dcdbf45b-85f8-4639-9955-7c63f6ec9189/rusijagoligojen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a6e5e79-bc28-4e44-b75b-c8ed42726785/11356305929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75539c83-bc50-46e1-b64b-525b1e1e116a/teliseti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/841cd22a-ffaa-482a-b85a-d22d4709caa8/77278923035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1516/0487/files/72342769863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7400/8741/files/5696517218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1497/4358/files/426554532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4387/1643/files/39797456124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0919/0305/files/how_to_find_the_residual_plot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3872/3226/files/68287455904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2086/0067/files/zaboxujowutaxunur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6668/2263/files/geometry_resources_by_chapter_3.2_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8887/9010/files/25380558975.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_off00008324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8324 5584 bytes
SHA-256: 5b0f016467445ee5ea33b7429041d5b1288e8eb703a42ebe0960b7cfb24d04d8
font_01_sfnt_off00009610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9610 10332 bytes
SHA-256: 0343613a502ac95474217d1c684ee719036f59a06921687edb64dce89661044f

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