Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1796d866673176…

MALICIOUS

PDF

77.2 KB Created: 2021-03-10 07:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 964fdbadfc8086e595261981b1190feb SHA-1: 176ea411cba360c01e811e237fe3fb76b5311312 SHA-256: ba1796d866673176243b69073cc3d433ea1716d31fc0fd7760ae5598539b8fed
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 0.9991

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://resalured.ru/wix?keyword=icivics+crossword+worksheet+answers PDF link annotation
    • http://tetupamino.mywebcommunity.org/hx_stomp_patches.pdfIn PDF document text
    • http://adv-workshop.site/obb_boxing_star_modgn9tv.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/mixer_mackie_1604_vlz_pro_made_in_usa_ccznu0.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/2f5b0666-907e-488c-afe5-a8b1cb638a50/porter_cable_fn250b_piston_stop_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be4ed21-9f01-47d7-b961-919690a300a6/7_month_old_milestones_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7532ea21-2581-418d-9125-8eff8bd055b3/a_divina_comedia_biografia_do_autor.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/meretuxojufewenij.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/film_walaikumsalam_paris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0d547ad-5b18-41c2-b791-029e0f31e80b/how_to_grow_red_romaine_lettuce_from_seed.pdfIn PDF document text
    • http://zegetafirotazaz.atwebpages.com/programming_clicker_garage_door_opener_keypad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14dae41c-b5ec-43c9-8b62-ffdd66f3702e/importancia_de_la_matematica_financiera_en_la_vida_cotidiana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc5828f-2ef1-49f4-934f-d733e0427d14/for_the_tcp_ip_protocol_suite_what_is_the_correct_order_of_events_when_a_telnet_message.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/tipos_de_motores_de_corriente_continua_y_sus_aplicaciones.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/pizuvamusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85ea3d50-ccfd-4792-bea5-1544889be2d8/i.t_jobs_in_ghana.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/how_to_insert_bobbin_case_in_sewing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/interpreting_graphs_of_proportional_relationships_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/baixar_iroot_apk_para_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/cpm_chapter_4_test_answers.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/82601947866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5d058e-3a62-48a0-9cfc-b8f335dea72c/does_danny_die_in_the_shining_book.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/zagafobinalisoziniw.pdfIn PDF document text
    • http://medexode.atwebpages.com/how_to_use_bose_soundbar_remote_control.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/83045739118.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_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 5148 bytes
SHA-256: c7e4350d1aabfcf5085afd8b271c6aeae8bf0a0772cb67893ec0e44547c97eaf
font_01_sfnt_off00010477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10477 10224 bytes
SHA-256: bd37c7d02a745dbc6d0c075bccea602f3adf53d90ea5872b2c5eace9bf3ef4d9