Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc09e3ba4dd90b3b…

MALICIOUS

PDF

77.3 KB Created: 2021-03-01 00:29:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f1fd63868205c98f9c60b282cc0485a1 SHA-1: 57c5ec98b3690e5abfc142af4cefbbbd8f42e3f1 SHA-256: dc09e3ba4dd90b3bc31da62b8b0879f546d3f14b761cf774cd210b25d5bed72e
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 0.9998

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://fokemale.ru/strik?utm_term=ford+3000+diesel+tractor+oil+change PDF link annotation
    • http://lenuvivureropi.scienceontheweb.net/gofafimofunusozosuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/gejawih/pizzeria_i_gladiatori_infernetto.pdfIn PDF document text
    • https://cdn.sqhk.co/xijisejes/iRHjawb/noxeru.pdfIn PDF document text
    • https://cdn.sqhk.co/bopesajan/jhggifn/vast_tv_listings_rapid_city_sd.pdfIn PDF document text
    • https://cdn.sqhk.co/vonofuguniti/jevigia/whatsapp_messenger_apk_2019_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/bopibege/tlYgihf/spacex_crew_dragon_launch_date_time.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/jenn_air_range_hood_reviews.pdfIn PDF document text
    • http://kiruvoxexuk.iblogger.org/tabela_de_nomenclatura_da_ordem_dos_mdicos_dentistas.pdfIn PDF document text
    • https://cdn.sqhk.co/linewebozid/ngiEER0/dewizobelabobafekigemorof.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/ljhEUIE/14461554257.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/14331517654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lisotabisalak.epizy.com/69317886947.pdfIn PDF document text
    • http://wubojupegija.rf.gd/73873827579.pdfIn PDF document text
    • http://sikadakomog.epizy.com/schweser_notes_cfa_level_1_price.pdfIn PDF document text
    • http://benamow.myartsonline.com/75543956007.pdfIn PDF document text
    • http://zaxesagujudiwa.epizy.com/construction_site_accident_report_form_template.pdfIn PDF document text
    • http://josegofubusem.epizy.com/kaxesaxijil.pdfIn PDF document text
    • http://jirataser.rf.gd/film_anime_romantis_sub_indo.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/samsung_galaxy_note_20_ultra_in_india.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_off0000f143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF143 5464 bytes
SHA-256: 176c0764863e5f86d04b6463c328395d0aaa96b507bb00402f60bc38857cb88f
font_01_sfnt_off000103d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D2 10560 bytes
SHA-256: 50ebebb46e0459725511f49ee85d79c550c5655d39156707983ed74bca9d59eb

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