Malicious PDF — malware analysis report

Static analysis result for SHA-256 2490a51902b09086…

MALICIOUS

PDF

43.0 KB Created: 2020-10-01 14:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 31b3147bb97fd785b67e3d74dee4c4c4 SHA-1: f6031c96d95b37b36a658d6e7c647ac7f7c51335 SHA-256: 2490a51902b09086fc07590f2627c9f61660d1e350863ad03453eeea068c4b2e
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=australia+map+pdf+free In PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/monivezaxaxidanino.pdfIn PDF document text
    • https://site-1037192.mozfiles.com/files/1037192/75038242461.pdfIn PDF document text
    • https://site-1037143.mozfiles.com/files/1037143/17784263488.pdfIn PDF document text
    • https://site-1037906.mozfiles.com/files/1037906/68132747755.pdfIn PDF document text
    • https://site-1038384.mozfiles.com/files/1038384/lepuxikadujav.pdfIn PDF document text
    • https://site-1037187.mozfiles.com/files/1037187/99038173299.pdfIn PDF document text
    • https://site-1037214.mozfiles.com/files/1037214/48219936800.pdfIn PDF document text
    • https://site-1036719.mozfiles.com/files/1036719/81447072017.pdfIn PDF document text
    • http://files.carlinvillefire.com/uploads/1/3/1/4/131483361/f57fc2f.pdfIn PDF document text
    • http://files.wonderforall.com/uploads/1/3/1/3/131398504/4978671.pdfIn PDF document text
    • http://files.manageyourpain.co.uk/uploads/1/3/1/3/131379321/makatoko.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/1/0433/1651/0873/files/27605112638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5941/1104/files/blood_drops_csi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0523/8692/files/tetonutinimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/51506441612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/68272370943.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_off00005e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E42 4840 bytes
SHA-256: 8bae03b209e2ae0123b83e117ab457e7e9b5586e8c7b1af8f5699c63acfd6f06
font_01_sfnt_off00006eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAF 10060 bytes
SHA-256: db6f1ffe4220ebdc0e2bcb3b487fe728bd79b8ce11c30f09d56abfd160ab7d00
font_02_sfnt_off00009125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9125 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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