Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead4f94156f3eb7a…

MALICIOUS

PDF

52.4 KB Created: 2020-10-11 19:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 53acaaa00faff13baead0a6ca2a4489f SHA-1: e3830387ce6b353082aa59be2dc56a2f973ce575 SHA-256: ead4f94156f3eb7ac429b4f9c4e42c17b7048b2b48f46eef0f73ca8dd94adee3
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://cctraff.ru/pify?keyword=handbook+for+mortals+wiki In PDF document text
    • https://site-1048576.mozfiles.com/files/1048576/dekapapokoxogo.pdfIn PDF document text
    • https://site-1042666.mozfiles.com/files/1042666/80345894874.pdfIn PDF document text
    • https://site-1038925.mozfiles.com/files/1038925/90361345031.pdfIn PDF document text
    • https://site-1037859.mozfiles.com/files/1037859/genujaga.pdfIn PDF document text
    • http://files.rudkin-genes.com/uploads/1/3/2/6/132682235/19ff5.pdfIn PDF document text
    • http://files.profesorelias.com/uploads/1/3/1/0/131070161/betesi_pesilevazifaw_verovigikoxo_sabidunesex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0042c9c7-5eda-462c-bb20-58d5500ffd01/28713949958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5764/2152/files/52356291694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9101/5320/files/57930268805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/1124/4710/files/pigudukavosivaverife.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_off00008ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFB 5312 bytes
SHA-256: 7dbd5f6d057258e0e93a507ffbbe79da858f0fdaa6948530dc7e04c9c01b066d
font_01_sfnt_off0000a1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1FD 10372 bytes
SHA-256: 6d96c2ffeceda43bb3164eb782be343172492795f76dfd3ec5066f322df2bf3d