Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb19dfb67dce94df…

MALICIOUS

PDF

34.6 KB Created: 2020-10-05 17:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 82db682c8f4dacaf5412c16a94e84fdf SHA-1: e2dfdf931b04390f6ae255e1db802cb2cddb3d1f SHA-256: eb19dfb67dce94df75ba69890281b1b399e8909f59bbc175e7734f9dadbb9fe5
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=semiologia+neurologica+pebet+soria+pdf In PDF document text
    • http://files.hannahjpark.com/uploads/1/3/1/6/131637755/labemofigipogi-wezite-rotod-guxutaxig.pdfIn PDF document text
    • http://files.ncscammers.com/uploads/1/3/0/9/130969341/nelizabeku.pdfIn PDF document text
    • http://files.mingtaoxu.com/uploads/1/3/1/6/131606397/ruvifumatuxid.pdfIn PDF document text
    • http://files.lilyhockcreationsfoundation.com/uploads/1/3/2/6/132696067/gamitek_zividib_xurexirebukoriw_pidefina.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/38aef3ac-3ddc-4d63-977c-7153d5369dea/51484047604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b31f2f-a1c9-4d43-835b-d758737e48fe/52339737484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/592b00dd-edf5-4811-be5c-25ab21fc6ebf/gubenawetanunezagasotoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4be8088-447a-4381-b3c4-ad8b05c702fd/75682256909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1507/7792/files/kebumubobonim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3051/9709/files/luna_middle_school_nisd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2508/3811/files/swot_analysis_from_guide_to_management_ideas_and_gurus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1889/7573/files/vegojusonumukejusege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4405/6471/files/code_vein_season_pass_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0855/6182/files/puriviwi.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_off000047c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47C0 5716 bytes
SHA-256: b053d4b0ef072a122a55bc48f0cc45a066aab2d2fa944ea85d1644d5d3ce0b20
font_01_sfnt_off00005b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B13 9960 bytes
SHA-256: 085bb4fc6fa7babe7b4b6a56e87eaa6e6d514c6158e5f64d723b61f3bfef3b0d

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