Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b37de49e3a54f87…

MALICIOUS

PDF

43.7 KB Created: 2020-10-04 09:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 18163078050255c011e18f12c0e8813d SHA-1: 74ce84c8cf8a22b0b3cf703d1f604951deac6f37 SHA-256: 8b37de49e3a54f87d00908444482394e0119ccd47e5f453f9c4282330d0d1afe
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=o+rh-+blood+type+diet In PDF document text
    • http://files.myrolllife.com/uploads/1/3/0/9/130969703/sepiguwek.pdfIn PDF document text
    • http://files.spinstersguide.com/uploads/1/3/1/6/131606472/bakekeka.pdfIn PDF document text
    • http://xukuxoj.aardvarklearningacademy.com/uploads/1/3/1/4/131452838/b5fe07b.pdfIn PDF document text
    • http://files.butterfly-identity.com/uploads/1/3/1/4/131483279/zeridapeperapul.pdfIn PDF document text
    • http://files.1nelson.ca/uploads/1/3/1/4/131453718/85d4d8ab0a.pdfIn PDF document text
    • http://files.braidafrica.org/uploads/1/3/1/4/131453253/43bf0bacac73.pdfIn PDF document text
    • http://wotini.nanaimoclippersmerch.com/uploads/1/3/1/6/131607062/4326887.pdfIn PDF document text
    • http://pewobamag.miamidogshow.org/uploads/1/3/2/8/132814930/wikuseka.pdfIn PDF document text
    • http://files.carrollspurco.com/uploads/1/3/2/6/132695675/8076230.pdfIn PDF document text
    • http://gafod.farmhousequilting.com/uploads/1/3/0/7/130739885/dikokokakipo.pdfIn PDF document text
    • http://files.cheyenne-stastyshyn.com/uploads/1/3/1/1/131164398/43bacbb6.pdfIn PDF document text
    • http://files.fotoartbyvincent.com/uploads/1/3/1/4/131407310/gerabi-vanoxegivep.pdfIn PDF document text
    • http://files.ncvetp.org/uploads/1/3/1/4/131437711/xixenumesugesukaxem.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/cdebf23b-57e2-4cf0-bdc5-a71c5e6690f8/76220791829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acbda698-f206-4020-bfe0-df9e447c03a0/febijesege.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_off00006f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4C 4960 bytes
SHA-256: b62cd3499051526bca371dc5755e6f0ea43c0c3afe774c23198d9da026ab6c47
font_01_sfnt_off00008024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8024 9900 bytes
SHA-256: 51fe1e4be94fef8b92a91b080c6786f132f64a01fde20b7939960cc9144c7603