Malicious PDF — malware analysis report

Static analysis result for SHA-256 80047bb6f27d2de3…

MALICIOUS

PDF

72.2 KB Created: 2021-03-02 00:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7756aed25ed89d41aeb7cdf333976619 SHA-1: 21591597ceca60201722b45b2abc04dcc8f0966e SHA-256: 80047bb6f27d2de3fa739f78534071fef3e4b54999ff57b43dba88e844ebebc1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://vilenefex.ru/123?utm_term=what+is+digital+communications PDF link annotation
    • https://cdn.sqhk.co/xeloxilava/jcgejfk/live_stream_fox_news_election_results.pdfIn PDF document text
    • https://cdn.sqhk.co/wanukawuwota/zqidgh2/wudojevukawedepez.pdfIn PDF document text
    • http://wosidigelime.iblogger.org/lizuzasoxuz.pdfIn PDF document text
    • https://cdn.sqhk.co/sisamide/fhbgdge/lijaradezovolipilozujujox.pdfIn PDF document text
    • https://cdn.sqhk.co/muzedikerum/af0MqAI/95197552703.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/ihaHbqp/fumebivorubirojesatewabel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xefowipiv.rf.gd/arris_router_model_dg1670a_default_password.pdfIn PDF document text
    • http://lekamidoku.epizy.com/what_does_a_tiger_represent.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/express_vpn_cracked_apk_latest_version.pdfIn PDF document text
    • http://lunijikujapike.epizy.com/aking_pagmamahal_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/54509903734.pdfIn PDF document text
    • http://timodetunidup.epizy.com/free_piano_sheet_music_all_of_me.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/gufewanuvepuvofolevuw.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/14491824674.pdfIn PDF document text
    • http://rewuwuja.onlinewebshop.net/47464645430.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/indikasi_cantilever_bridge.pdfIn PDF document text
    • http://jobisazukom.rf.gd/bibiliya_yacu_and_install.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_off0000de9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9D 5272 bytes
SHA-256: a12bb00c0bca02b3e6483911cc328eb364ac038e47b7c2ca6de9013abbd68c9c
font_01_sfnt_off0000f072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF072 10296 bytes
SHA-256: 26292a2992ca3b23386bee8da6222abcab7e2396d770e369913f46d98f4717a1

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