Malicious PDF — malware analysis report

Static analysis result for SHA-256 d688a665a76ac7c6…

MALICIOUS

PDF

41.6 KB Created: 2020-11-08 04:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1aff708fe871b5e5dc8af6edbb180e7e SHA-1: 8cf680be1eeaa3fa42c243de9b0aa9f09d741f55 SHA-256: d688a665a76ac7c64e965258e2e47d2cf5345298de0fc108b56b908764b95525
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://traffmen.ru/123?keyword=wndr3400v2+netgear+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404529/normal_5f9e4ce9a50ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/67728004733.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/93071167754.pdfIn PDF document text
    • https://fepefik.files.wordpress.com/2020/11/pokemon_glazed_reborn_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/barron_s_toeic_7th_edition_vk.pdfIn PDF document text
    • https://gawazufe.files.wordpress.com/2020/11/mass_effect_andromeda_soldier_build.pdfIn PDF document text
    • https://divitejebos.files.wordpress.com/2020/11/vuromawisarekalavi.pdfIn PDF document text
    • https://danusodemoza.files.wordpress.com/2020/11/38382546147.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/95952686241.pdfIn PDF document text
    • https://milosozefij.files.wordpress.com/2020/11/35704632235.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/does_portland_glass_replace_inspection_stickers.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/10762875908.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_off000062bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BD 5564 bytes
SHA-256: 0f49111273e6625e6a3c5fa53f29c08f50adafc91b64a3d5e31481e6f1a0446b
font_01_sfnt_off000075b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B1 10728 bytes
SHA-256: 816b928668ea9018960af2869da0586c9db94764e72fddd97b205abf15d389e5