Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e445c8b77da6424…

MALICIOUS

PDF

79.0 KB Created: 2021-04-16 16:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b5adbffd080005f5a2675131301cdd5f SHA-1: 11d1aa6ac9e6b8d2c30d4831439dd4a13a96e53c SHA-256: 8e445c8b77da6424449192f4e2e2faefa7cd05929d091508b293fb7491224776
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/strik?utm_term=my+life+next+door+chapter+summary PDF link annotation
    • http://vazawujuzu.sportsontheweb.net/james_and_the_giant_peach_summary_chapter_36.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/tuwazuvegugomofudeteweja.pdfIn PDF document text
    • http://namafafiteg.mypressonline.com/44251718151.pdfIn PDF document text
    • https://cdn.sqhk.co/pakebisas/hfFcrha/kinepepadewabuweta.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/ybhimgd/1959494122.pdfIn PDF document text
    • http://subefimajifulik.22web.org/lagu_barasuara_api_dan_lentera.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/craftsman_garage_door_learn_button_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/IjaDoid/identity_v_stage_twitter.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/pulse_code_modulation_matlab.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/xomopabewaxaxisamowiviwex.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/bosuz.pdfIn PDF document text
    • http://loxupuf.mygamesonline.org/proximodistal_pattern.pdfIn PDF document text
    • https://cdn.sqhk.co/katutilit/gqFhje7/95544464281.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_20166df198b54fdebad09816a1ea1278.pdf?index=trueIn PDF document text
    • https://79ab8074-8148-4faa-9219-f6cdfa35bc15.filesusr.com/ugd/99e004_02bee728a9844e01888fa0d6beb7a87f.pdf?index=trueIn PDF document text
    • http://rexawisoza.epizy.com/best_resume_templates_for_freshers_word.pdfIn PDF document text
    • http://kosisat.epizy.com/75524612778.pdfIn PDF document text
    • http://pojenuza.epizy.com/how_to_adjust_carburetor_2-cycle_engine.pdfIn PDF document text
    • http://misamoxatupepos.rf.gd/dbt_worksheets_for_borderline_personality_disorder.pdfIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_abb03e7c98d942cb97264ec5fca3a167.pdf?index=trueIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_1dfe5ab48ce3488db9be21c81e18dddc.pdf?index=trueIn PDF document text
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_743d3f27cb0e49328d9ba1d7717574ac.pdf?index=trueIn PDF document text
    • http://tevaluzax.atwebpages.com/23902389927.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_off0000f7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EF 5572 bytes
SHA-256: 0e1d76cd0c4bf4cd5f54a037a3f1e37b909a08fb2e2195bff6e88eb66a129eff
font_01_sfnt_off00010ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD1 10500 bytes
SHA-256: 8713ddd21188d9955e749ffeb3d4c39845a7aa96e27161cf6efa516ad3644565

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