Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb2495be559b0ff…

MALICIOUS

PDF

99.9 KB Created: 2021-04-04 07:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4da5c7a8f745788cb07dd8389ce2efc1 SHA-1: 42b057d10a71f4c6fa00bc21a375be1e37dc018b SHA-256: ebb2495be559b0ff684be961233e9db6cfb15ff10051a17fb4a3b67d86977eac
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to search queries, directing users to external sites.

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://dugedepap.ru/wix?keyword=clockwork+orange+book+pdf PDF link annotation
    • http://kvyovk.xyz/bupumenidutifuzokfm.pdfIn PDF document text
    • http://alcexpress1.xyz/the_tempest_quotes_mirandap1dee.pdfIn PDF document text
    • http://lirifajo.sportsontheweb.net/45193262783.pdfIn PDF document text
    • http://shoop-fk.ru/current_hot_topics_in_social_psychologyl9bg2.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/lixubolevogoramorinukati.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/sedivobin1lnuk.pdfIn PDF document text
    • http://rat-red.space/ark_extinction_gacha54h43.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/entrepreneurship_2020.pdfIn PDF document text
    • http://xubajur.mygamesonline.org/tutorial_basico_sketchup_make_2017_carpinteria.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/milkweed_book_moviehr49v.pdfIn PDF document text
    • http://mavaxur.mywebcommunity.org/arduino_uno_francais.pdfIn PDF document text
    • http://xupokaxe.medianewsonline.com/40223640206.pdfIn PDF document text
    • http://uplrezina.site/68502154541z7yzq.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/gavapozalilup/decyl_glucoside_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/99868882633.pdfIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_67f8c034ac224a3a8a1492fff80ece10.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/the_missing_season_2_episode_7_recap.pdfIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/non_conformance_report_form_iso_9001.pdfIn PDF document text
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_8b59c6cd0e3546a19e02ddf267777330.pdf?index=trueIn PDF document text
    • http://temolujipu.myartsonline.com/91155338130.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_off0001452b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1452B 5348 bytes
SHA-256: edcc2e161bba5f28e7f9df000a7209931911957882032a6a5e321c271305c682
font_01_sfnt_off0001577c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1577C 13348 bytes
SHA-256: e2881da9837c2b9aa0d2bb73e7cc218e7d8f5dbd00d78cbb8c8059e1f3073089

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