Malicious PDF — malware analysis report

Static analysis result for SHA-256 5efaa178f8aff8f4…

MALICIOUS

PDF

47.0 KB Created: 2020-11-07 06:18:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: bdfe10f69940315132434b3f58019080 SHA-1: 016d8bdee4498ad72ece49f102ad01052d75de8e SHA-256: 5efaa178f8aff8f42b0ed299f0a1b1ce621c3a36f4f6a16777a3566d3cd0e796
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://traffking.ru/123?keyword=popular+sheet+set In PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/jopaluz-wiwoniles-dunibuxiwolagat-wetunis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dukitavix.files.wordpress.com/2020/11/juneturufejodakoruvagusun.pdfIn PDF document text
    • https://mibejadefoxo.files.wordpress.com/2020/11/tilefeg.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/wupoxenebewinavetemu.pdfIn PDF document text
    • https://rabewinu.files.wordpress.com/2020/11/perasimu.pdfIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/8625666511.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/64792928681.pdfIn PDF document text
    • https://tibepitetuj.files.wordpress.com/2020/11/56891646696.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/377722f0-faa3-4eaa-b248-f50dad6447b3/adobe_acrobat_pro_apk_cracked.pdfIn PDF document text
    • https://fimazibido.files.wordpress.com/2020/11/83099004074.pdfIn PDF document text
    • https://talonusutax.files.wordpress.com/2020/11/31363982229.pdfIn PDF document text
    • https://xivesepolila.files.wordpress.com/2020/11/30877645579.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_off0000787e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x787E 4908 bytes
SHA-256: 1f024af114cce0f02d51c1a32814729447c9a4db08c22aa899c1aa3ab0bf8b90
font_01_sfnt_off0000891e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x891E 11512 bytes
SHA-256: 56df7fa0469707de76760d7056e58e352773ae494f1126b6103c97b9d8131656

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