Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc74b5c088e998d…

MALICIOUS

PDF

88.1 KB Created: 2021-03-09 14:34:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 025242f4e2ee8560432e429ffb83adc0 SHA-1: 3542929e2daff74426bfbaf256a2212c97f0e82a SHA-256: dcc74b5c088e998d558b480f36b27ef996f10a300f6726a5190b08470fc2fb97
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external URIs, with a primary suspicious URL being 'https://botokaw.ru/award?keyword=enzo+soresi+il+cervello+anarchico+pdf'. The document body is heavily obfuscated and appears to be a malformed PDF, suggesting it's designed to exploit PDF vulnerabilities or deliver malicious content via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://botokaw.ru/award?keyword=enzo+soresi+il+cervello+anarchico+pdf PDF link annotation
    • https://cdn.sqhk.co/jivonaxadu/PSggZAm/gimejaf.pdfIn PDF document text
    • http://xadikefivo.iblogger.org/95674626754.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/bowflex_wr30m_watch_battery.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/steering_the_craft_epub.pdfIn PDF document text
    • http://wawesoja.sportsontheweb.net/oracle_sql_and_pl_sql_performance_tuning.pdfIn PDF document text
    • http://metagopu.22web.org/anlise_swot_artigo.pdfIn PDF document text
    • http://lomigizukifomor.22web.org/7362914678.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/gjGegih/nike_icon_clash_leggings_yellow.pdfIn PDF document text
    • http://handler-autoscout24.com/ziludujulirakufibobolupszrov.pdfIn PDF document text
    • http://mmmuuuue.space/36566556890c6zj3.pdfIn PDF document text
    • http://paksorond.xyz/gujuzitimikarizunuxituwgjlj.pdfIn PDF document text
    • http://tumuduwaju.mypressonline.com/kikuwon.pdfIn PDF document text
    • https://cdn.sqhk.co/semegopo/jeNjfjc/paint_tool_sai_square_brush_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/jijhifS/vupifulexani.pdfIn PDF document text
    • https://cdn.sqhk.co/daxegajok/N1hjhaH/32622273888.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/aHAidgj/lucky_songs_app.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/WWBhage/cartoon_network_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojiranat/CU5PKid/rival_knights_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/futogifoku/iG2GsXn/87386489633.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1babbaa0-329d-4f82-8abe-6c5c1c2456f8/eating_attitudes_test_eat-26_en_espaol.pdfIn PDF document text
    • http://lagiwafumize.rf.gd/vocabulary_builder_activity_ancient_egypt_and_kush_a._content_vocabulary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9ec00b-3f09-4645-9267-92f3a94bff31/qsc_rmx_2450_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70212058-31de-4081-a0cb-24186a85418d/citizen_eco_drive_wr100_watch_price.pdfIn PDF document text
    • http://wolunotolebo.rf.gd/el_camino_de_sherlock_descargar_gratis.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/lista_de_verbos_regulares_irregulares_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/592965ef-0e8f-478a-9986-99b87900d4b7/cen-tech_battery_charger_not_working.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_off0001192d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192D 5308 bytes
SHA-256: ede32e2f0585dc1f462a6179758d0becd88c72d4f91bbcf2c89c170ab30ad979
font_01_sfnt_off00012b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4B 11712 bytes
SHA-256: 18fd8ff72c40c829d2baaf49302a8ce987d35ee97bb6aa27c032503a7f38b832