Malicious PDF — malware analysis report

Static analysis result for SHA-256 6885c72dcc511366…

MALICIOUS

PDF

89.0 KB Created: 2021-02-23 07:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6a952bc2203e16924d1e1731d58364ad SHA-1: a261e89b18bd3c2516ec45f83369d717f7d5f913 SHA-256: 6885c72dcc511366f50299a6b0b657be52016977539051caf5b703000ed08190
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/strik?utm_term=top+bar+bee+hive+designs PDF link annotation
    • http://hookup157.site/4839824224117jf3.pdfIn PDF document text
    • http://tefukuk.iblogger.org/91453992846.pdfIn PDF document text
    • http://electrumwallet.buzz/nexanibopidowutovumikaledw6h1n.pdfIn PDF document text
    • https://cdn.sqhk.co/fivufotimad/j3ziq8B/dalabivogu.pdfIn PDF document text
    • http://gifozuxozud.22web.org/electric_field_hockey_level_2_answer.pdfIn PDF document text
    • http://apeech.ru/organic_chemistry_john_mcmurry_7th_editionz0lbk.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/Plhj09d/line_tower_wars_ai_warcraft_3.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/hjCWrW7/lunawibonuwugodekejitewa.pdfIn PDF document text
    • http://furniture21.online/weather_radar_near_me_tampaewgg4.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/heNjhoq/colony_bank_routing_number_eastman_ga.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/jjdSjdu/savings_goal_calculator_excel_formula.pdfIn PDF document text
    • https://cdn.sqhk.co/devurekon/iibw3co/suppressor_tax_stamp_status.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/rhdDBjd/riu_palace_playa_arena_gorda_punta_cana.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/hdGiijg/fire_free_battleground_survival_hopeless_squad_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/c5hd02V/tamil_play_hd_movies_2019_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xidodaxu/jbehd5b/car_logo_quiz_online.pdfIn PDF document text
    • https://cdn.sqhk.co/gunuzuli/cPm5cY8/can_you_mix_2_colors_to_make_red.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/dhjjihb/duzaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/36965907165.pdfIn PDF document text
    • http://zezuwolajo.rf.gd/dasibivovinezuniper.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/corrections_victoria_annual_report.pdfIn PDF document text
    • http://bubalafugevale.rf.gd/cambridge_latin_course_unit_1_stage_6_translations.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/rafajusavominixava.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_off00011f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F67 5336 bytes
SHA-256: 249578a7d7606d5cf66194ad27012db2082a00b3d4ea93604dac3a4cf8ccb8da
font_01_sfnt_off00013187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13187 10844 bytes
SHA-256: 130b0f405496a5429d92edb29012fd207c0eb47d58c481b86b45160203af600d

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