Malicious PDF — malware analysis report

Static analysis result for SHA-256 5176aeb0ed6eb398…

MALICIOUS

PDF

41.3 KB Created: 2020-10-01 12:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 7fabefbaf2f9922d2b98e90830355984 SHA-1: 1313a983f35e40a6f50b0f68d1be0928fcef7818 SHA-256: 5176aeb0ed6eb398d22e893d5272a920e15a5a7417535050389c686a9f2c06b2
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://ggtraff.ru/strik?keyword=biotechnology+and+its+applications+class+12+notes+pdf In PDF document text
    • http://files.coverallbases.org/uploads/1/3/2/6/132681969/4af332dd98.pdfIn PDF document text
    • http://dajefada.laceinthemoon.com/uploads/1/3/2/7/132740186/0dbde5ff46d0.pdfIn PDF document text
    • http://files.elanceborzoi.com/uploads/1/3/0/7/130776035/fa6723a1.pdfIn PDF document text
    • https://site-1036816.mozfiles.com/files/1036816/murudatuseguzixixerufuw.pdfIn PDF document text
    • https://site-1037884.mozfiles.com/files/1037884/77481498299.pdfIn PDF document text
    • https://site-1037237.mozfiles.com/files/1037237/77565318015.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/suleduxixosuravuz.pdfIn PDF document text
    • https://site-1038919.mozfiles.com/files/1038919/39252045574.pdfIn PDF document text
    • https://site-1039684.mozfiles.com/files/1039684/xipijepolev.pdfIn PDF document text
    • https://site-1036722.mozfiles.com/files/1036722/penodo.pdfIn PDF document text
    • https://site-1037261.mozfiles.com/files/1037261/fafesudiwutika.pdfIn PDF document text
    • https://site-1036965.mozfiles.com/files/1036965/wajunezisofunifesiber.pdfIn PDF document text
    • https://site-1039675.mozfiles.com/files/1039675/pivakufexume.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000062c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C9 5656 bytes
SHA-256: b365b965398d7e9e514a067d494f76d541c3cb7881cd57f71549ab68a6f1f512
font_01_sfnt_off0000761b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761B 10040 bytes
SHA-256: d781c48b0171e0696ee41aab9f0a0d0f7ce57830a020497088d5e4bab966f35a