Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ce552289a6d624…

MALICIOUS

PDF

73.6 KB Created: 2021-02-26 01:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 45ce0daffe1a4ae5dfa1b27162900e2f SHA-1: 40190f184e2c96f1cdb7690a49f12eac0b599bdc SHA-256: 97ce552289a6d624184f672ef4774d58b522e7430fa83a594c04457a461102f1
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains and potentially malicious content, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic and ML classification. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the structure suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=sun+joe+spx3000+vs+spx4000 PDF link annotation
    • https://cdn.sqhk.co/wefopijupe/ggee72Q/vonurozavofemesig.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/25668974995.pdfIn PDF document text
    • http://rineset.xyz/815882039951rhw6.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/ghggjWP/descargar_cartoon_wars_gunner_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/PzhihaB/download_tower_defense_geometry_warriors_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/jiidhhj/nexititevisiwaminitosupa.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/ghrihi2/rejamusogumi.pdfIn PDF document text
    • https://cdn.sqhk.co/wukatigubo/UbNhggc/drive_in_movie_theater_ct_open.pdfIn PDF document text
    • https://cdn.sqhk.co/rolidofajug/hcmjhgg/delikoxasegunifon.pdfIn PDF document text
    • http://crysety.xyz/tupapobaguzijiwua88oh.pdfIn PDF document text
    • http://xobazosapiru.22web.org/estructura_del_sistema_endocrino.pdfIn PDF document text
    • http://microdigitalmeter.xyz/complex_fractions_worksheet_hardnymhx.pdfIn PDF document text
    • http://zirekafeti.iblogger.org/97310455788.pdfIn PDF document text
    • http://falisekivi.iblogger.org/bdt_capital_partners_llc_company_information.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bolapapuziku.epizy.com/darth_maul_mask_template.pdfIn PDF document text
    • http://pemukusa.epizy.com/comparing_prokaryotic_and_eukaryotic_cells_worksheet_answers.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/35744593758.pdfIn PDF document text
    • http://fizufizobizud.epizy.com/business_ethics_course_books.pdfIn PDF document text
    • http://vevojadiren.epizy.com/59097092354.pdfIn PDF document text
    • http://varoxekoduv.epizy.com/bluebook_20th_edition_free.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_off0000e36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36A 5176 bytes
SHA-256: ce0bc09e5ad50866850a875e983eb33aea979b6f29df1bce164dfdd6502fa99d
font_01_sfnt_off0000f53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53B 10556 bytes
SHA-256: d19f14e29d3d46be56a5e3fbe3cb5132a2abc57c50e7b9601479616146fb3e79

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