Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8de234ae2730d33…

MALICIOUS

PDF

66.6 KB Created: 2021-02-22 10:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1e31651e8e25e3d44e53657a290717a6 SHA-1: bf6de8bb89fe1c28589176fcc9cfb0df7634b0b9 SHA-256: b8de234ae2730d3381a60192b14c7ae91539104c8d1e2b93ca5723753e7e33ab
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/123?utm_term=ford+windstar+2003+tire+size In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vorizilel.pdfIn PDF document text
    • http://bonboxstudio.com/sexobejab2mw78.pdfIn PDF document text
    • http://tosety.xyz/maze_runner_characters_ageswh4aa.pdfIn PDF document text
    • https://fipufiradak.weebly.com/uploads/1/3/0/8/130813779/jekuripikodoxun_farorirax_zamujevuporuxum.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/lokenun_xafilogawilanur.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/stickman_ninja_2_ultimate_ninja_warrior5nc47.pdfIn PDF document text
    • http://ellmax-site.xyz/990610105792mwyh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443815/normal_6031dd594731b.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/south_park_capitulos_latino2ff8k.pdfIn PDF document text
    • https://mivatuvogap.weebly.com/uploads/1/3/4/0/134040868/5703256.pdfIn PDF document text
    • http://winoorama.site/461539657700w2up.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/levovod/cant_find_realtek_hd_audio_manager_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/mlb_postseason_format_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/84747735176.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/local_government_questions_and_answers.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_off0000c871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC871 5320 bytes
SHA-256: 342dc0058e1f80e1de11b2f3bb72441cc781b9b53f921c77ce9539a6a61d16b0
font_01_sfnt_off0000daaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAF 10688 bytes
SHA-256: b49f5ab9b845b086b89edfa7cd8d26642d7cce63e1f57c0a5d62cc3483db9f80