Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51ff1ffe1aa205b…

MALICIOUS

PDF

35.4 KB Created: 2020-10-14 12:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: bc742a945639ce89cfb5039e1ee05fa9 SHA-1: f5506c64590e153ba65e4a52c7cc7ad14051f83d SHA-256: d51ff1ffe1aa205b71980a9e63cee2621f763da279827b8e701f95e6736fc2e3
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://ggtraff.ru/strik?keyword=bowel+prep+nice+guidelines In PDF document text
    • https://site-1040144.mozfiles.com/files/1040144/67754754092.pdfIn PDF document text
    • https://site-1043259.mozfiles.com/files/1043259/77874551350.pdfIn PDF document text
    • https://site-1037894.mozfiles.com/files/1037894/5682539538.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/dekefomivupe-kovak-talajonipa-fedebiraroz.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/2122744.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/837046.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/sulusilalope-jobede.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/1/0438/2444/7648/files/mapa_de_bolivia_y_sus_departamentos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1026/7035/files/arp_request_frame.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_off00004d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D63 5172 bytes
SHA-256: 11aa6047c9fccd6eeb6208138dcbd41557e78016c5a75e776eaa7b64938eca22
font_01_sfnt_off00005f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1E 10092 bytes
SHA-256: 2a19169e222e3ec2be0970b106bdb1e9986825d52328fed2892b00920e1cd36f