Malicious PDF — malware analysis report

Static analysis result for SHA-256 af34a30327db483a…

MALICIOUS

PDF

76.6 KB Created: 2021-06-13 06:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 90090dabf6ef9cee6532a333b55e161d SHA-1: 2408bd6093c949377602acc72c20797fa0433b08 SHA-256: af34a30327db483aa58bb89168b04c386015c4704d47dbfa29fc2ce75ccfe2a1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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://huntic.ru/pbw?utm_term=oxidation+state+of+chromium+in+k2cr2o7 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4472793/normal_5fc9984120754.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_6048dd8e6d2d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_60137d8902fc6.pdfIn PDF document text
    • https://ragajepegoxi.weebly.com/uploads/1/3/1/3/131379061/xetumelefisu.pdfIn PDF document text
    • https://lifibopunikesi.weebly.com/uploads/1/3/3/9/133999807/zinikorupasexo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bijinim.pbworks.com/f/74541408631.pdfIn PDF document text
    • http://tagexoba.pbworks.com/w/file/fetch/144423246/how_to_use_excel_for_daily_expenses.pdfIn PDF document text
    • http://rorazokazog.pbworks.com/f/13066292401.pdfIn PDF document text
    • http://dekokos.pbworks.com/w/file/fetch/144621957/b2_level_english_test_with_answers.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/w/file/fetch/144521493/is_wwe_2k_android_offline.pdfIn PDF document text
    • http://lifuzopa.pbworks.com/f/55897393769.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/parin.pdfIn PDF document text
    • http://mavawakuto.pbworks.com/w/file/fetch/144886695/apprendre_l_espagnol_dbutant_gratuitement.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144895302/14631546661.pdfIn PDF document text
    • http://beratirupo.pbworks.com/w/file/fetch/144509970/8842779173.pdfIn PDF document text
    • http://kutegazez.pbworks.com/f/after_effects_gold_text_template_free_download.pdfIn PDF document text
    • http://kivotin.pbworks.com/w/file/fetch/144677244/pros_and_cons_of_free_education_essay.pdfIn PDF document text
    • http://pulixojesu.pbworks.com/f/how_to_make_perfect_omelette_eggs.pdfIn PDF document text
    • http://rajejor.pbworks.com/w/file/fetch/144752502/little_big_planet_2_file_download_ps_vita.pdfIn PDF document text
    • http://fokurid.pbworks.com/f/ley_federal_del_trabajo_actualizada_2020.pdfIn PDF document text
    • http://siwinuguxis.pbworks.com/w/file/fetch/145220445/cast_away_movie_download_720p.pdfIn PDF document text
    • http://bowawesup.pbworks.com/f/sikadawafuwenezunepuno.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_off0000ecf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF0 5600 bytes
SHA-256: 7687e142c50d3fd81dfc6ca837622b5e7ed125d9211aea0264912c46233b1f82
font_01_sfnt_off0000ffe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE1 10784 bytes
SHA-256: 40ad342c994fb4d0ba291632af5db4f913b57a358def7e4a4c222b9d7649bf9b

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