Malicious PDF — malware analysis report

Static analysis result for SHA-256 efc77208b96b764f…

MALICIOUS

PDF

35.9 KB Created: 2020-10-05 18:37:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a810c11d0f99354602c0243b0deeff40 SHA-1: a99afd0757a61fa26accd7c7964f01e0c9543cb4 SHA-256: efc77208b96b764f06f296b7129cb42c497a9f80173ad796784f23505c23de1c
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=microeconomics+for+today+pdf In PDF document text
    • http://files.rockcreekgoldenirish.com/uploads/1/3/1/8/131856907/bozareneve.pdfIn PDF document text
    • http://files.weiacu.com/uploads/1/3/2/8/132814958/mananub_kizagigefimigo.pdfIn PDF document text
    • http://nexenibat.firststatebaptist.com/uploads/1/3/1/4/131406710/9011247.pdfIn PDF document text
    • http://lapudowu.100womenwhocaremedina.com/uploads/1/3/1/4/131436978/ac28d739658.pdfIn PDF document text
    • http://files.hutaka.com/uploads/1/3/1/0/131069970/panotojonoj.pdfIn PDF document text
    • http://wijapa.pathfindersnature.com/uploads/1/3/1/8/131857782/bufavezapironug.pdfIn PDF document text
    • http://lipeduf.krownandglory.com/uploads/1/3/0/8/130813765/radudo-tasesifaguzat.pdfIn PDF document text
    • http://files.marcadys.com/uploads/1/3/0/8/130874676/9961273.pdfIn PDF document text
    • http://wosag.revsara.com/uploads/1/3/1/4/131407089/suxiradid.pdfIn PDF document text
    • http://sinako.tasorganicwines.com.au/uploads/1/3/2/3/132303195/gakimuguvunigezerodi.pdfIn PDF document text
    • http://files.foresthavensuffolk.com/uploads/1/3/0/7/130775346/julepadej-lunawifuke-rarokigi-feganububarosuk.pdfIn PDF document text
    • http://gopusodu.sarayaharon.com/uploads/1/3/0/8/130874359/827b9ff61.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/1/0495/1470/9160/files/fairest_lord_jesus_lyrics_christy_nockels.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8330/8442/files/99950272506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/mudiv.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_off000050ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50AB 5376 bytes
SHA-256: d8e6e06b25d583a2e52c180754e32deafc00108729c9f427df7fc67e9e5d38dc
font_01_sfnt_off000062f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F1 9360 bytes
SHA-256: d93b3cc13f9726846bb5ab4f08c39d438d82c450313868b30b08419c355a2a82