Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebea02f1beabb97…

MALICIOUS

PDF

79.6 KB Created: 2021-03-15 20:13:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3f848a0e066413c815162d0d7320f9db SHA-1: 6507d9c57bbb0bf93dd11dde5f86e3e4fafd239e SHA-256: eebea02f1beabb97be26df1e25ce40439ce5858473c0b2d195b2373065a54047
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to obscure malicious destinations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the high ML score strongly suggest malicious intent, likely for phishing or malware distribution. The primary malicious URL identified is https://midufefew.ru/strik?utm_term=which+star+is+brighter+than+our+sun.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=which+star+is+brighter+than+our+sun PDF link annotation
    • http://igcopyrightforhelps.com/29156613094nlds9.pdfIn PDF document text
    • http://zemavavidebades.22web.org/16747825118.pdfIn PDF document text
    • https://cdn.sqhk.co/tefebenum/i1PagBQ/rekamixinasesibujez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420766/normal_5fe114a8dcc40.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/ZiiOsge/72687325933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421042/normal_60432732b534b.pdfIn PDF document text
    • http://juligum.22web.org/agri_extension.pdfIn PDF document text
    • http://astropsychology.site/cost_to_mail_30_lbsc6cj6.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/certificat_de_cession_de_vhicule_en_ligne.pdfIn PDF document text
    • https://cdn.sqhk.co/fitodofafe/jji9Uje/tiktok_songs_2020_mashup.pdfIn PDF document text
    • https://cdn.sqhk.co/latosagax/egdjRGv/83821568455.pdfIn PDF document text
    • https://cdn.sqhk.co/xelibini/c0jijht/27344158068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426690/normal_602d41043073b.pdfIn PDF document text
    • http://twobigs.space/sputnik_sweetheart_lyrics_project_orangerk8dx.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/lost_ocean_coloring_book_review.pdfIn PDF document text
    • http://appletopshop.ru/vuvavaserabol7eo5k.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/graphic_design_courses_online_uk_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426415/normal_5ffad07c4637a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379626/normal_5ffb4db53e1f5.pdfIn PDF document text
    • http://datovufes.scienceontheweb.net/adverb_clause_of_contrast.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zawidapiwixub.epizy.com/44078692204.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_off0000f91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91A 5180 bytes
SHA-256: b45ee2d1c59fccc4dd7d8a51ccfa473a572f39d9d6f067aef190e42072bd5793
font_01_sfnt_off00010ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC9 11372 bytes
SHA-256: 408b36cc3165723ebdb816b12958f082d3fa34438361973cf1598198e48cf512

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