Malicious PDF — malware analysis report

Static analysis result for SHA-256 81dcd099bea8e52b…

MALICIOUS

PDF

72.7 KB Created: 2021-01-19 07:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a8b77841f70eaef1ed82cc4a9a1d08ce SHA-1: 951b073fdcf0cc2a8259b04c20ac14c221e7ef36 SHA-256: 81dcd099bea8e52b5432f8f4cd75742220995f103604af5657ba9ff17dccb130
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://ggtraff.ru/wb?keyword=bang%20bang%20bang%20tik%20tok%20full%20song In PDF document text
    • https://static.s123-cdn-static.com/uploads/4447649/normal_5fc665f37eae5.pdfIn PDF document text
    • https://site-1173894.mozfiles.com/files/1173894/81987808642.pdfIn PDF document text
    • https://cdn.sqhk.co/wujejelot/fXxqjg8/27287120386.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/SiigiRj/nizexoweburoxisomifutaju.pdfIn PDF document text
    • http://damomemisogadex.iblogger.org/quran_arabic_to_english_translation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377098/normal_5fc3b78fa89fc.pdfIn PDF document text
    • https://cdn.sqhk.co/nivurerazusa/8jhM8ka/zisokeli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426071/normal_600630994ce26.pdfIn PDF document text
    • http://manoligixave.66ghz.com/famille_d_accueil_chien_guide_marseille.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_5fb7b0a3d0474.pdfIn PDF document text
    • https://site-1173730.mozfiles.com/files/1173730/bagawijaxi.pdfIn PDF document text
    • https://site-1168133.mozfiles.com/files/1168133/57561074650.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/vikukinumet/clicker_heroes_guide_2018.pdfIn PDF document text
    • http://tujefozumuresul.epizy.com/58678447076.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/vande_mataram_female_song_pagalworld.pdfIn PDF document text
    • http://mejefelutirarej.epizy.com/italy_travel_guide_blog.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/uc_browser_app_for_android.pdfIn PDF document text
    • http://gezibetaw.epizy.com/mifovijemikerekipe.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_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 5092 bytes
SHA-256: 12c12d2fb932a488afb462b87a40289513783e5c08fbdecabb871f10b610847a
font_01_sfnt_off0000f148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF148 10748 bytes
SHA-256: c08e7808f00b0145a21892ff63961d6d35b06667181fd03aeba4cb74d21e3320

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