Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e0520dd7b6feb1…

MALICIOUS

PDF

76.5 KB Created: 2021-03-12 15:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 37cc8159b6382e4083f3940c8dfd9c85 SHA-1: 8e763dd2a6ef0081c58f193ecee9e1f5766d4c6a SHA-256: 67e0520dd7b6feb106ffb9ba974a931ee70f91d8dd5a0b83b18216b2b5e5c4e0
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/123?utm_term=business+email+writing+format+samples PDF link annotation
    • http://davupopebuwiser.sportsontheweb.net/11281313220.pdfIn PDF document text
    • http://tederurokeroga.iblogger.org/kusozufidugubatezu.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/bMji1Mu/alpha_guns_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/tgiieFt/torasosolulakel.pdfIn PDF document text
    • http://antonio-ita.space/34463172059wvxd0.pdfIn PDF document text
    • https://taburexil.weebly.com/uploads/1/3/4/3/134374137/wepajuwokenufus-sesarujo-tewutopakatoxak-lujox.pdfIn PDF document text
    • http://pekefosijemibi.sportsontheweb.net/written_pattern_for_virus_shawl.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/55537745928a2o3m.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/mjghbTn/zombie_survival_mod_apk_1._4._0.pdfIn PDF document text
    • https://letonezesuju.weebly.com/uploads/1/3/1/3/131383444/wasaxisi_joganifixafa.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/iYjbFgg/power_hover_cruise.pdfIn PDF document text
    • https://fakodide.weebly.com/uploads/1/3/0/8/130874451/merodew-wotix-sividufo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jemileti.atwebpages.com/lexus_es_300_hybrid_reviews.pdfIn PDF document text
    • http://lowijul.rf.gd/did_jayco_get_bought_out.pdfIn PDF document text
    • http://fobegakolu.epizy.com/wenixexapex.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/xivikiderukufas.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/comentario_de_matthew_henry_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/gravity_falls_theme_recorder_sheet_music.pdfIn PDF document text
    • http://vogurapake.epizy.com/examples_of_triple_bottom_line_reporting.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_off0000ef53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF53 5360 bytes
SHA-256: 56eaaac86f4e95b33c7074a6eacd085c9d5b0438a94a319549916c9e9678bff5
font_01_sfnt_off0001018e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018E 10548 bytes
SHA-256: b1b2452760110c0c757d266def1a61270c3377bb853157ccd158f7afe257b6f7

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