Malicious PDF — malware analysis report

Static analysis result for SHA-256 58228dabe600d658…

MALICIOUS

PDF

35.6 KB Created: 2020-10-01 15:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b24c62fcf9db2c60df343d597fa43d89 SHA-1: b5d09ffa28548c41e0dfa9c40c3bef59b4f3ef6f SHA-256: 58228dabe600d658f60d526fc67e3673ae6fe9af9347e77c10692eafd9242b70
184 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.
  • 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://gettraff.ru/strik?keyword=centroides+de+areas+y+lineas+por+integracion+pdf In PDF document text
    • https://site-1040136.mozfiles.com/files/1040136/dikajuzoneruwotenolozeza.pdfIn PDF document text
    • https://site-1038772.mozfiles.com/files/1038772/23282190255.pdfIn PDF document text
    • https://site-1039273.mozfiles.com/files/1039273/77532987118.pdfIn PDF document text
    • https://site-1037196.mozfiles.com/files/1037196/181422650.pdfIn PDF document text
    • http://jodivi.amandakloy.com/uploads/1/3/1/4/131406717/xibafez_marifabix_tafajonafodi.pdfIn PDF document text
    • http://files.asobiteppanyaki.com/uploads/1/3/2/6/132682124/8757250.pdfIn PDF document text
    • http://sijotexun.graceforthebroken.org/uploads/1/3/2/6/132695780/vexemawepogu.pdfIn PDF document text
    • http://suwagitot.ergonsolar.com/uploads/1/3/0/7/130775934/26095b.pdfIn PDF document text
    • http://katali.chednunez.com/uploads/1/3/1/8/131856097/7091865.pdfIn PDF document text
    • https://site-1036711.mozfiles.com/files/1036711/rexatusujedajiv.pdfIn PDF document text
    • https://site-1037886.mozfiles.com/files/1037886/tojidozuwizitufowopapu.pdfIn PDF document text
    • https://site-1037204.mozfiles.com/files/1037204/jopigudodotez.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/1/0476/3946/2054/files/mefoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9885/5840/files/32338904117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2276/1635/files/robuzerupobowaki.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_off00004bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BDB 5328 bytes
SHA-256: 356f687bf4b46fd66b4611382ea1028a539edf7f36cf874f7a37a283b3085d89
font_01_sfnt_off00005e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E13 10108 bytes
SHA-256: 8d31535eb9d1886f3b7a7235bb5ad46c217c1a802ababff5cf36420a6c2006d1

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