Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b8e80b50c6e0e56…

MALICIOUS

PDF

44.8 KB Created: 2020-11-07 05:02:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: e279edf4cb48170d241cdea20fb0a75e SHA-1: 2ee3233ae1a91ba9920b28f8c65464f10aee2bd0 SHA-256: 1b8e80b50c6e0e56bb6ef8aff9c1d1b9aec0725fb8aeefd636732c0d26a1d45a
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://traffking.ru/123?keyword=alpha+wars+7 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f8c1c3a7f946.pdfIn PDF document text
    • https://pudafakomixi.weebly.com/uploads/1/3/4/5/134506615/bazeja_tajezirozujodiw_nubewa_lagop.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/1983365.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/5092761.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/78f7b7ac897d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5f9d5d9a64b6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/gesowu.pdfIn PDF document text
    • https://petivubeso.files.wordpress.com/2020/11/79638912372.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/ella_enchanted_free.pdfIn PDF document text
    • https://xixunetov.files.wordpress.com/2020/11/20920130359.pdfIn PDF document text
    • https://zetetojowu.files.wordpress.com/2020/11/st_raphael_prayer_for_singles.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/catechism_of_the_filipino_catholic.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_off00007172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7172 5068 bytes
SHA-256: 36f4151782784ad6024b2fa75056234718338fa07192f7b32f3bafdc20dc1df8
font_01_sfnt_off000082c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C1 10720 bytes
SHA-256: a197c14e92a8431cdfdafdae3c479a2e1487b1d4b3672fd8d0177c98dd832860