Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5321c029a2e326…

MALICIOUS

PDF

44.2 KB Created: 2020-09-30 02:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 54b3ffb4ace3808aaf3af291ad9ecb4f SHA-1: 2c28509747024edea23312d555273d38ea720755 SHA-256: 8a5321c029a2e3264c27843cd67b111ebfd6d1bcc50b651583c4610fd455aa17
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=calendario+champions+league+2018+19+pdf In PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/mezovukukifadotewa.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/90579768818.pdfIn PDF document text
    • https://site-1036945.mozfiles.com/files/1036945/zirugozi.pdfIn PDF document text
    • http://files.dunblanebowlingclub.org.uk/uploads/1/3/0/7/130776204/6eeb76a289a60ec.pdfIn PDF document text
    • http://files.indiandiggingsschool.com/uploads/1/3/0/7/130776639/kujigug_ruxisasifugu_zunirup_neximapajo.pdfIn PDF document text
    • http://files.capstonechiro.com/uploads/1/3/1/4/131453256/38073.pdfIn PDF document text
    • http://wusos.ashlynnsboutique.com/uploads/1/3/1/4/131437594/tuganixesifatur.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/1/0471/0350/8630/files/minority_report_sentencia_previa_2002_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4336/2715/files/american_red_cross_first_aid_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/naruto_shippuden_mod_apk_ppsspp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9528/8744/files/72088549137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/canada_visa_application_form_in_oman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8011/2535/files/15265783718.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_off00005cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDA 6148 bytes
SHA-256: 1a8119a16586562061bdc3a15dd90bdf1009eaff61948cb81233ae8f764f4d6e
font_01_sfnt_off00007197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7197 16064 bytes
SHA-256: 79c7e3182dd65bc0f2bef3f2c6d451294d12b5b94d4020ae761ed4a5087c3f57