Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28e9fd390c09074…

MALICIOUS

PDF

72.7 KB Created: 2021-02-25 18:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 13fe5401142742c5546228b1c8e64fe5 SHA-1: 73c94bb9188b2bea80d3f52987de9f5c2a35409a SHA-256: d28e9fd390c0907400c73d3206abf5d4f6f7575c9a4c199aee26a6744a8e2256
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://jacksth.ru/award?keyword=maximum+principal+stress PDF link annotation
    • https://cdn.sqhk.co/bokupajokim/h71dzaA/pilot_salary_2020.pdfIn PDF document text
    • http://astropsychology.website/applocker_logs_powershelltd0jl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406776/normal_5ffec1d2373f1.pdfIn PDF document text
    • http://hookup153.site/nijanedawesibibi5wb37.pdfIn macro / runtime command snippet
    • http://fruitnaturs.space/where_can_i_watch_jersey_shore_season_3_online_for_freecafct.pdfIn PDF document text
    • http://stroy-level.ru/tazumiwixuna8kxeh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401976/normal_602fd58d0af8b.pdfIn PDF document text
    • http://tameenegypt.com/57488898944q8boh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383695/normal_6008e9e2a1cc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455405/normal_6016f0a3411ac.pdfIn PDF document text
    • http://mosdendy.store/vanevoxigijenejawaw561.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/0ifZTgc/the_new_york_times_logo_white.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxukulalodi/ehgLghq/flick_goal_level_78.pdfIn PDF document text
    • https://cdn.sqhk.co/batitiviz/8hs8gjC/battery_powered_lights_for_closet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploaIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xidazeze/personality_development_meaning_and_definition.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/kezemiradigu/84123463933.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_off0000dfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 5152 bytes
SHA-256: 1f23d0d5f8ac378ae4413e3162a4ebc84cc624672c60253f03d00111fa98c8c9
font_01_sfnt_off0000f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 10360 bytes
SHA-256: 83588d3c26ab29540c9e64302538c003444cda5daf8bc61ec2397d335a97932a

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