Malicious PDF — malware analysis report

Static analysis result for SHA-256 8904696839a74db0…

MALICIOUS

PDF

75.8 KB Created: 2021-03-06 16:09:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ec2e017fa803453c180f583e5f1400a3 SHA-1: d2b3611c41c83d1baee2f0fb275f8d19b71c4ff5 SHA-256: 8904696839a74db04f98307f4c5f0c311f4bc2a762aab8565c66b867366c65fc
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 0.9993

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/strik?utm_term=the+lightning+thief+musical+songs+ranked PDF link annotation
    • http://ndfnasg.xyz/what_does_chemical_weathering_mean_in_geographyg1x0f.pdfIn PDF document text
    • http://hookup671.site/aasimar_warlock_celestialpjbqu.pdfIn PDF document text
    • http://maska-respirator.com/descargar_discografia_de_julion_alvagz0r5.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/subaru_pressure_washer_repair.pdfIn PDF document text
    • https://cdn.sqhk.co/gutifusuf/ijgiia8/religion_synonyms_and_antonyms.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/racecards_racing_postdomp2.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/81129299471.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/Vhc4Sij/star_wars_galaxy_s_edge_lightsaber.pdfIn PDF document text
    • http://foteraza.22web.org/mobaxodigobuxe.pdfIn PDF document text
    • http://xsale.trade/amarna_letters_translationlkxru.pdfIn PDF document text
    • http://mufadapi.22web.org/winoxebudi.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/53643544423.pdfIn PDF document text
    • http://kimelaxuwivupa.iblogger.org/dokaritonu.pdfIn PDF document text
    • https://cdn.sqhk.co/jememobak/fihvo5w/halal_chicken_burger_shop_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/32F0tJk/82634916390.pdfIn PDF document text
    • http://buvanerupapuko.22web.org/electrical_symbol_for_ceiling_outlet.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/ifn3hjT/nemigemolotenaraw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fofodas.rf.gd/91606463727.pdfIn PDF document text
    • http://nevejubusager.rf.gd/excel_chart_template_not_working.pdfIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_56b9348afcd14689ba0cae9431aa107c.pdf?index=trueIn PDF document text
    • http://tolokob.rf.gd/how_to_outline_a_screenplay.pdfIn PDF document text
    • http://gaximomek.rf.gd/31951278632.pdfIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_538f4450d97242a6ad4103b0052c9272.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_off0000ea2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2C 5448 bytes
SHA-256: 283023d5b5d63b5c0ee05997ed2c0960c11c669052e375aa355954680f242a02
font_01_sfnt_off0000fc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8D 10920 bytes
SHA-256: a55fc91f6de19f3d3811374bf0dbc7552d68bcafde4811da0f33300eb65f3463

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