Malicious PDF — malware analysis report

Static analysis result for SHA-256 813fed3ca80c9af7…

MALICIOUS

PDF

69.3 KB Created: 2021-02-24 12:49:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 34771161de5e309941132b8e23a5160e SHA-1: fb7388fb51b57dd8b1f68cd9e0a4417dcd38382a SHA-256: 813fed3ca80c9af720c5e47b24490df893c0dff73307eec8c0f7c85bef92926a
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/wb?keyword=the%20art%20of%20star%20wars%20the%20force%20awakens%20review In PDF document text
    • http://justamorem.com/15632574666vllgv.pdfIn PDF document text
    • https://cdn.sqhk.co/ripigopes/hVibXig/gifugadad.pdfIn PDF document text
    • https://cdn.sqhk.co/fejumoraw/dhigdih/pesulil.pdfIn PDF document text
    • http://fastgetme.online/20462422337b5nfu.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/6icejdt/clock_change_new_york_2019.pdfIn PDF document text
    • https://kugavulaxux.weebly.com/uploads/1/3/4/4/134454690/1709492.pdfIn PDF document text
    • http://winoorama.space/mogudipovevukowoxaxuln5vj.pdfIn PDF document text
    • https://xamubamujizej.weebly.com/uploads/1/3/1/4/131483378/901683.pdfIn PDF document text
    • http://busurman.space/zelda_ocarina_sheet_music_12_holejdl35.pdfIn PDF document text
    • http://sportplays.ru/dolavaxajesagiwefebavoauc9y.pdfIn PDF document text
    • http://doordash.fun/9426084715pm31m.pdfIn PDF document text
    • http://esagafow.fun/heartland_rainier_shed_assemblyhkkz3.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/0ILiiag/91468672429.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/5jgFjfk/73721207791.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/untjbgI/sorus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31F 5100 bytes
SHA-256: ec47fd21ab415a87391c8349ab17a4ddeb672b2db453867964646e12e00274d1
font_01_sfnt_off0000e48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48D 10412 bytes
SHA-256: b117649bf9c60bd5de8cd6965f71974d7d585247340692159d6ad11631839b32