Malicious PDF — malware analysis report

Static analysis result for SHA-256 b830765687ad672d…

MALICIOUS

PDF

91.7 KB Created: 2021-04-16 21:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e9ec4e8584ff584f634a46870ac61cb7 SHA-1: d99090c6258204886d27901832046cefb17c82a1 SHA-256: b830765687ad672d7bffe0f53edfcdfc298b6a85c65a1556267afb2714472fe5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or SEO spam. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs, including one pointing to 'soxebez.ru', suggests the document is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=replace+toner+error+brother+printer+dcp+7065dn PDF link annotation
    • https://cdn.sqhk.co/vomemubevu/ieawePu/mx_off_road_mountain_bike_trails.pdfIn PDF document text
    • https://cdn.sqhk.co/makulowujip/jchQ35g/26214666875.pdfIn PDF document text
    • http://kofoxirozagitu.iblogger.org/best_spoken_english_book_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/fggycii/street_racing_hd_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gobefuvumi/hgqHXjh/bixebusuwitenaze.pdfIn PDF document text
    • http://rawuzexo.iblogger.org/free_printable_blank_calendar.pdfIn PDF document text
    • http://kagifosotumaden.iblogger.org/leesville_lake_fishing_report_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/jheJIhb/login_cabify_driver.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/ifjchhV/90421574665.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/hcnTiav/winky_lux_flower_balm_different_colors.pdfIn PDF document text
    • https://kusafulidofet.weebly.com/uploads/1/3/4/0/134017607/wipadujat_segalomir_gogori.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/Fjbhhko/19128741174.pdfIn PDF document text
    • https://cdn.sqhk.co/sirobuse/jhjihWq/lego_dimensions_simpsons_level_guide.pdfIn PDF document text
    • https://kumobavogi.weebly.com/uploads/1/3/2/3/132303339/2e383a939c68524.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/jbijiek/merge_robots_clicker_idle_tycoon_game.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/1jdiagf/killer_night_shift_plot.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/OOjgieZ/dalizusu.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxinugad/cUghVZU/swing_trading_books.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/gi72Aig/california_medical_board_license_renewal_form.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sulaloweg.epizy.com/jegepuponusu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3B 5420 bytes
SHA-256: 2537aa7fa5ce21a19257213450ef1c24cb02916fcf466a007f10435b0384bbaa
font_01_sfnt_off00012c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C99 11348 bytes
SHA-256: 0d444fe84cc2d243ddf6acc8b139925b89f03daa27dec0d2382746b05e563060
font_02_sfnt_off00015338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15338 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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