Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a5994dbcab7ef7…

MALICIOUS

PDF

43.0 KB Created: 2020-11-08 23:18:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 14ee77ea64816b75b0a045212de84bfa SHA-1: ceb4c23ce82c17edb6a2ddd75129cdc57f51ee83 SHA-256: 85a5994dbcab7ef7776ce9f21074474d776f17d6e1fe17cba2ceced440e31a89
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://traffine.ru/aws?keyword=phim+bo+han+quoc+long+tieng+moi+nhat In PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/b5702843.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/regovuxidujinixeram.pdfIn PDF document text
    • https://numiduramar.weebly.com/uploads/1/3/4/5/134595515/pupipem.pdfIn PDF document text
    • https://tinijaxiri.weebly.com/uploads/1/3/4/4/134440903/9850126.pdfIn PDF document text
    • https://mokogexikimowo.weebly.com/uploads/1/3/4/3/134321985/bomudive_zaniwo_zajelizu.pdfIn PDF document text
    • https://kadefetu.weebly.com/uploads/1/3/4/4/134471860/wajitame_jinuvusibizod_kupamanekodezi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://rovafola.files.wordpress.com/2020/11/bruce_lee_le_jeu_de_la_mort_streamin.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/australia_map_with_cities.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/68091325827.pdfIn PDF document text
    • https://losorul.files.wordpress.com/2020/11/ruzepomagowo.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/49970254106.pdfIn PDF document text
    • https://wezodik.files.wordpress.com/2020/11/59584403987.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C70 5088 bytes
SHA-256: 3f3bc7cdb9d66e0383b3f6af3da55964af5a524da6e088bad258a460aa1e5e1b
font_01_sfnt_off00006d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8C 9864 bytes
SHA-256: 8d17e6e40daa29b79c3aab9b1e6df36b00d7e0e7a09653f91fe79b4b6abf6e1d
font_02_sfnt_off00008f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F60 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378