Malicious PDF — malware analysis report

Static analysis result for SHA-256 2839a9cedbdbd91b…

MALICIOUS

PDF

82.3 KB Created: 2021-03-15 00:46:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9320816aa04f3b156fb04494c558cb4f SHA-1: 3bf70e4753cf00fcae5f90e0fdbc3d7810da6260 SHA-256: 2839a9cedbdbd91bc051b8b7d765673d56e0556fd0ded42743c01174d7c01f59
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 0.9992

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://xezojetit.ru/123?utm_term=trap+beat+hip+hop+instrumental PDF link annotation
    • http://bitjoms.xyz/driver_canon_pixma_ip90_windows_7_32bit3g458.pdfIn PDF document text
    • http://powerpoint4you.ru/garmin_vivosmart_3_manual_dansk1r0my.pdfIn PDF document text
    • http://kefets.xyz/the_inferno_2_hosthe5dm.pdfIn PDF document text
    • http://opensalon.xyz/60975988240yzqxp.pdfIn PDF document text
    • http://tvoeobrazovanie.fun/texojixekopikoxpgbh.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/lg_440g_tracfone_unlock_code_free1s0lk.pdfIn PDF document text
    • http://shopeuro.pro/orbit_sprinkler_timer_manual_modenhoh4.pdfIn PDF document text
    • http://eroganoficial.site/john_legend_all_of_me_sheet_music_freeooo27.pdfIn PDF document text
    • http://beautysss.site/tagedolidupojexofaseneo7u7s.pdfIn PDF document text
    • http://xarusogu.22web.org/balance_sheet_account_format_examples.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/59255386688rndf3.pdfIn PDF document text
    • http://instasale.company/frontline_commando_d_day_apk_modbah36.pdfIn PDF document text
    • http://triple-doska6.club/evaluative_questions_reading_comprehension_worksheetseed61.pdfIn PDF document text
    • http://dommasters.site/is_dds_discount_open_todayphjrt.pdfIn PDF document text
    • http://eurozone.pro/34483285024ypfof.pdfIn PDF document text
    • http://bestita.space/tufunesagenewiwjra3.pdfIn PDF document text
    • http://ag-management.space/cub_scouts_uniformneuia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dosatetirudipu.epizy.com/ncert_mathematics_textbook_for_class_12.pdfIn PDF document text
    • http://xawedanivewemis.epizy.com/relieving_letter_format_in_english_word.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/97421484114.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/abab_song_form_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/balance_sheet_vs_income_statement_snapshot.pdfIn PDF document text
    • http://filuteka.rf.gd/69618638862.pdfIn PDF document text
    • http://lepevalir.rf.gd/fixidebip.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/label_template_16_per_sheet_no_border.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_off0001032b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032B 5148 bytes
SHA-256: a96a78326e2efa09ff7ba053bb4b40378b27c0a3a330de0680c10013fd165117
font_01_sfnt_off00011476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11476 11460 bytes
SHA-256: 79bfd6563b46c359d37b0d9abe893b2c06c744f7ba78adf35a1c7798e12cf458

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