Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce0dc576e8f5fa7…

MALICIOUS

PDF

68.8 KB Created: 2021-02-19 10:04:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 689fc36b489a5afb803d920805fa4d85 SHA-1: 92308e8d958672da0884c1f836ae59a6a7719322 SHA-256: 5ce0dc576e8f5fa7ede340fc09a155fd3f652be97fc85e1a196ea0ef17570e1f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to 'bologen.ru' and a keyword suggesting a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wb?keyword=conscious%20discipline%20for%20parents%20in%20spanish PDF link annotation
    • https://ribofefafuf.weebly.com/uploads/1/3/4/7/134770843/97379.pdfIn PDF document text
    • https://bopelesi.weebly.com/uploads/1/3/0/8/130874615/lutijone_wuxake.pdfIn PDF document text
    • https://simepatu.weebly.com/uploads/1/3/4/2/134267103/kexipase_gubaneja_zebujorumu.pdfIn PDF document text
    • http://zagavuxowipoj.22web.org/57352176190.pdfIn PDF document text
    • https://revoninutilira.weebly.com/uploads/1/3/5/3/135338282/gixigowede.pdfIn PDF document text
    • http://fonozuzaj.iblogger.org/782142417.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/jfFOjge/fashion_hair_color_summer_2020.pdfIn PDF document text
    • http://dukovasupufe.iblogger.org/gangster_movie_all_songs_2016.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/fexuror/laravel_email_template_builder.pdfIn PDF document text
    • http://mujunego.epizy.com/mivekagesurevep.pdfIn PDF document text
    • http://gokevoluwizob.rf.gd/jamestown_colony_worksheets_8th_grade.pdfIn PDF document text
    • http://mukesijurifa.epizy.com/jemewojinekevi.pdfIn PDF document text
    • http://tudavoje.epizy.com/vimefi.pdfIn PDF document text
    • http://nuwikomoxiso.epizy.com/gusufidafe.pdfIn PDF document text
    • http://wupewujivijulo.epizy.com/jadifutisatapawomat.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_off0000d246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD246 5148 bytes
SHA-256: 3bad80186a2a688909ae1c2a0abe2a3c7274e76598efb1dff45f51978c3bcf4f
font_01_sfnt_off0000e3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 10060 bytes
SHA-256: 9f151aae1ed5875e4dab8e0e115ca02f96c2b3354c7501748009f911b0e10d7d

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