Malicious PDF — malware analysis report

Static analysis result for SHA-256 b617603d92f32143…

MALICIOUS

PDF

75.4 KB Created: 2021-03-25 02:03:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9b703fff434978f879d0d6377e0a99a6 SHA-1: 3216342f35fad7b3ff9fedf3324cd21a4fd8c6a9 SHA-256: b617603d92f32143320477525ead4d910c099cf197bf8f2cf978169ede23f3d1
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URI 'https://soxebez.ru/wix?keyword=earth+cave+map+ff1' is a primary indicator of malicious intent, likely leading to a phishing or malware download site. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

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://soxebez.ru/wix?keyword=earth+cave+map+ff1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387922/normal_5fe80122362f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482218/normal_60371b02444aa.pdfIn PDF document text
    • http://kiruvoxexuk.iblogger.org/blood_bowl_2_teams_legendary_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/jjPtm2X/22763543862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486975/normal_602948088037b.pdfIn PDF document text
    • https://cdn.sqhk.co/bopibege/BLjeL4U/pixel_force_restart.pdfIn PDF document text
    • http://tetiviguxawik.getenjoyment.net/dinosaur_yoga_cards_free_printables.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/g9giGTX/nikana_prime_or_dragon_nikana.pdfIn PDF document text
    • http://xaduwojitodefo.66ghz.com/dezuvamego.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gukutimaguvuzum.onlinewebshop.net/datajinuvujebolirebipogiz.pdfIn PDF document text
    • http://tosabukevosubar.myartsonline.com/asientos_contables_ejercicios_resueltos_mexico.pdfIn PDF document text
    • http://zuxuxakoves.rf.gd/41368344068.pdfIn PDF document text
    • http://vegobojogaroju.rf.gd/tumuvop.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/57299317879.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/mivofuwetagenazazomo.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/liberty_bell_march_sheet_music_alto_sax.pdfIn PDF document text
    • http://romipozaxijida.rf.gd/tufonemivufo.pdfIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_5eb75a2d35e6463aa17e04cee274153d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/completing_the_squares_worksheet.pdfIn PDF document text
    • https://b24182fa-1fee-416c-9f57-41d8a36573e1.filesusr.com/ugd/1cc367_cf64cae8c0744b2caddc7d1a40e22c4d.pdf?index=trueIn 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_off0000ebe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 5112 bytes
SHA-256: 71220149f0b6a63a872debd591c31e346bdef1c85dbab3906b915a570a237557
font_01_sfnt_off0000fd2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2E 10376 bytes
SHA-256: cd2c693f90d45f006469986abc3bd7d89d91959570aed8f2591529fa2e9100ee

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