Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f21aee2cc1c736…

MALICIOUS

PDF

45.6 KB Created: 2020-10-13 05:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7f9fa380b5eca33e8d8d3c1445a5754f SHA-1: 7dfe4ebfa6a7df035826f0ef14689b6da046880d SHA-256: b7f21aee2cc1c736d84ec0111ad17984c6640922a1ee51e1512e713038e423b4
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=micro+injection+molding+machine+pdf In PDF document text
    • http://files.shannonbibby.com/uploads/1/3/1/3/131378771/pojomodaxipuzawo.pdfIn PDF document text
    • http://files.chocolateangelboutique.com/uploads/1/3/1/6/131637218/6341118.pdfIn PDF document text
    • http://xamobod.mymodernsolutions.ca/uploads/1/3/1/1/131164239/4197492.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/87c33fd0-2aad-48ae-9817-d1e715d5f7b0/3120004160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/340a9595-1aa8-40b9-a4e1-b97ce8447ca2/45574679856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73fc726d-5307-45fc-9e8e-4e9d3bce7d44/vogudasasuwoloxijabug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/636b9d47-70d9-42c3-abb5-8b2865fe9806/lofinugawajew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c509fe7-dd9d-4692-b8a6-5a4cccceae4b/74505404844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f331481f-d886-4d4c-bfc3-cac5c57a2fcb/59334521102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22eb51ed-422c-4b1e-83e4-e62e203045f6/kexiruxazodeluzik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6464/0159/files/50912762407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7679/1719/files/10_x_20_shed_foundation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/kenmore_790_electric_range.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7381/4172/files/feduravoxavazixilubesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/zikekanivuwijejawebi.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_off000074df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74DF 5472 bytes
SHA-256: 149f4334d86e34e1ffbc943f7228f6529c901dd0737fa2af8abbda22eed94cf6
font_01_sfnt_off00008759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8759 10144 bytes
SHA-256: 1b6911da710f0174b3e0f2f311ce3659b723707ff8edd868dae33198c6cc4ae2

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