Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc10754acdc853d…

MALICIOUS

PDF

75.3 KB Created: 2021-02-02 15:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d11024ca99a298fd893e747f82bbbbb5 SHA-1: 1dfb5cccf20d698534d5efec203779ec05489920 SHA-256: ebc10754acdc853ddba5d37353ce8c4807c62bc58fbb520efae54a6f18e0ece6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, as malicious phishing content. It contains numerous embedded URLs, with a primary one pointing to 'seumenha.ru', likely intended to deliver a malicious payload or redirect to a phishing site. The document's structure and embedded links suggest it is part of a phishing campaign designed to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://seumenha.ru/wb?keyword=income%20and%20expenses%20excel%20template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4505839/normal_5fdc7a56e8dd2.pdfIn PDF document text
    • http://leopolds.space/best_of_2020_music_cleand1u85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483097/normal_5fec340fc5810.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/NhaW4gi/soccer_world_cup_2018_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369150/normal_5ffe212303f40.pdfIn PDF document text
    • http://romeita.space/21281367137bmx51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416132/normal_5ff5f32122944.pdfIn PDF document text
    • http://shoes-storie.club/62230864442uhc8p.pdfIn PDF document text
    • http://hookup671.site/94383815839lr1l6.pdfIn PDF document text
    • https://ligexuvuzi.weebly.com/uploads/1/3/0/8/130814340/83250d496b.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/g9Digjd/beast_quest_app_review.pdfIn PDF document text
    • http://trokot-newshop.online/color_changing_wallpaper_for_wallsqpzvc.pdfIn PDF document text
    • http://constructionhouse.info/536072257613ib4v.pdfIn PDF document text
    • http://persequen.com/nebagozr1jxc.pdfIn PDF document text
    • https://vikabedegopeve.weebly.com/uploads/1/3/0/8/130874339/3267497.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/loneminovu/black_friday_hd_movie_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/cute_baby_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/88314182176.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/18336136942.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_off0000eaf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF3 5128 bytes
SHA-256: 0008fadab1baab285bea4abc0eb6ca88eb986ed266a764c318d10584bb85dded
font_01_sfnt_off0000fc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 10380 bytes
SHA-256: afd74d7a4a6eec1d344e658fa50683a68c06edd0c65be5621ac4eace372640bc

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