Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2beaf74dd0e66c…

MALICIOUS

PDF

75.9 KB Created: 2021-03-17 02:53:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c898bc0f77effc31df086ac4c9db5410 SHA-1: 1c1bd64dcb8253c054f969bf3cb325d6bf5d63dd SHA-256: 3a2beaf74dd0e66c869e8a4b5383cffb520d251c7e948fbefc29613f63e2a65d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains a large number of embedded URIs, many pointing to disposable hosting domains, suggesting a link farm or phishing lure. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate 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://botokaw.ru/wix?keyword=does+betta+fish+need+filters PDF link annotation
    • http://lulaterunudagob.iblogger.org/11146250127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_603399b77bb6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421330/normal_5fe1b15ccde2e.pdfIn PDF document text
    • http://werisafijorarit.iblogger.org/rosenuzuranifosodo.pdfIn PDF document text
    • http://sekitubamonit.22web.org/83023911888.pdfIn PDF document text
    • http://sofoviwov.iblogger.org/microlife_blood_pressure_monitor_replacement_parts.pdfIn PDF document text
    • http://sinakarazeg.22web.org/xolifuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423442/normal_601ae65f95b94.pdfIn PDF document text
    • http://verezitabel.66ghz.com/gollux_prequest_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_604ca0c28a734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5fd5f3a21922e.pdfIn PDF document text
    • http://polanuredun.iblogger.org/ankho_ka_kajal_song_dj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gibegedagaseri.epizy.com/star_trek_into_darkness_where_to_watch.pdfIn PDF document text
    • http://rojepubaxogo.epizy.com/define_cinematography_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/wood_laminate_sheets_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/chiamata_anonima_android.pdfIn PDF document text
    • http://ranovisodada.epizy.com/sql_queries_interview_questions_free.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/draw_entry_ballot_template.pdfIn PDF document text
    • http://fixeruzebiket.rf.gd/readynas_duo_disk_compatibility.pdfIn PDF document text
    • http://ropurudowilume.rf.gd/reading_practice_worksheets_for_kindergarten.pdfIn PDF document text
    • http://ronufabadexulab.epizy.com/letanukoketomofudalapul.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_off0000ec3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3E 5136 bytes
SHA-256: 861982fc25ee708ed2cf854d28a2d2a77d4320547028df37039f066124804e0d
font_01_sfnt_off0000fdab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAB 10840 bytes
SHA-256: 9cbb4fefc566e99e3c09575991193ae53a83e47f203ccf6ae71bb5487ced1385

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