Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f09367258600912…

MALICIOUS

PDF

49.5 KB Created: 2020-10-07 19:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2da79174996dcd83c92bb4a3c70db7c7 SHA-1: 766b0dc506958374bd7f78184db56ddd3d5741a6 SHA-256: 0f09367258600912df8ec6645e6c906c8ec982ea11e2c7aee8a9fb774558d317
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://cctraff.ru/strik?keyword=oraciones+de+adjetivos+calificativos In PDF document text
    • http://files.rentatent-sw.co.uk/uploads/1/3/1/4/131438464/9454813.pdfIn PDF document text
    • http://files.kindredliveband.com/uploads/1/3/2/6/132695759/4516521.pdfIn PDF document text
    • http://milesasi.jyefinancial.com/uploads/1/3/2/6/132681370/3303446.pdfIn PDF document text
    • http://gevufape.fleischerstudios.com/uploads/1/3/2/6/132680981/ruxomu.pdfIn PDF document text
    • http://dumavefal.soundsandmotionhoughton.com/uploads/1/3/1/1/131164159/7782927.pdfIn PDF document text
    • http://nizelaxem.garden-artworks.com/uploads/1/3/0/8/130874368/92b233b296e519.pdfIn PDF document text
    • http://files.legacyhomerentals.com/uploads/1/3/1/1/131164322/boxumezasadeguvitiw.pdfIn PDF document text
    • http://relug.ylcollegesta.org/uploads/1/3/1/3/131384055/xabirub.pdfIn PDF document text
    • http://files.thelearningcornerpreschool.com/uploads/1/3/1/4/131406449/8514914.pdfIn PDF document text
    • http://fubivare.skateteamindy.com/uploads/1/3/2/3/132303093/f6d1d9cb9afd4be.pdfIn PDF document text
    • http://boroma.annecrylen.com/uploads/1/3/1/0/131069934/9023023.pdfIn PDF document text
    • http://motute.visualmediaonline.com/uploads/1/3/1/4/131411341/modewusilo_wusilav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A23 4964 bytes
SHA-256: 20760f1c59e8474f5113f8b1228fa84ece99fd76ae9d128ff8b54c091ea132cb
font_01_sfnt_off00007b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B19 15860 bytes
SHA-256: 97a647858606acd8f4792c38d85f84f79d42f8e2e294cf497d9233b5a941fa97
font_02_sfnt_off0000aad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD2 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230