Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2f65f72f14cec6…

MALICIOUS

PDF

77.8 KB Created: 2021-03-11 01:17:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c3bef878c652d7ca0024be1371562ce3 SHA-1: b536361af51d0f40331feb4cf4f20e07147c0450 SHA-256: fc2f65f72f14cec6d3fd85b513cd4fecc29e86420f2a49094326d83f14f1095c
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, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution lure.

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://gimoguvi.ru/strik?utm_term=python+gui+programming+tutorial+pdf PDF link annotation
    • http://tricitysikhs.com/jefofaxefugedidurujupooht1.pdfIn PDF document text
    • http://niwopofe.scienceontheweb.net/audio_books_mp3.pdfIn PDF document text
    • http://smartycredit.info/73659503566lbmhy.pdfIn PDF document text
    • http://alcozerox.com/35121773345gmb3m.pdfIn PDF document text
    • http://noxaduva.mypressonline.com/86978740211.pdfIn PDF document text
    • http://ottics.ru/90341059896577yw.pdfIn PDF document text
    • https://cdn.sqhk.co/tixuniwe/igfiajc/demetrios_chapter_3_apk_free.pdfIn PDF document text
    • http://leree4.club/how_to_reset_rainbow_vacuumu0a7s.pdfIn PDF document text
    • http://zulesaxeririv.sportsontheweb.net/pamafolozipejotajazo.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/baPgcge/gofuzugosewozu.pdfIn PDF document text
    • http://xalenupom.getenjoyment.net/fezexokasukafux.pdfIn PDF document text
    • http://usesol.xyz/global_peace_index_gpi_reportqcgg4.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/vozodofebefol.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/wapovebokanudasu.pdfIn PDF document text
    • http://jetinaxisodew.mypressonline.com/the_brigands_of_rattlecreek.pdfIn PDF document text
    • http://instapriz365.site/4618719149569b20.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/r_gupta_ctet_book_paper_2_in_hindi.pdfIn PDF document text
    • http://tersq.fun/prepositional_phrase_worksheet_with_answers_grade_5sujp9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusebirenox.myartsonline.com/14819637553.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_off0000f329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF329 5380 bytes
SHA-256: d2ab74b394cd3da1e15d0348771f69a6f32c5d32f0984a21e57598a23dd9eeec
font_01_sfnt_off00010558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10558 10784 bytes
SHA-256: f3c6edf02d6290c627a6bbabbc152615b62fdb9e6fda296deeed79c9429e9301

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