Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20943569b13620f…

MALICIOUS

PDF

72.7 KB Created: 2021-02-24 12:56:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b2993c450427e4819e51099444f40733 SHA-1: 3013ac127f51e5b2b3be2c0eacdf49524aa5e6b0 SHA-256: d20943569b13620f6b3fc12f150f977b2bab92bc1ae79ad4b4c13f308ad4bc4b
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristic firings indicating it is a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery, masquerading as a game mod download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/wix?keyword=clumsy+ninja+mod+apk+happymod PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451927/normal_5ff2227fe8592.pdfIn PDF document text
    • https://cdn.sqhk.co/fezivabuja/aKjeYif/movie_theater_time_management_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405420/normal_5fdefcd87a6b1.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/el7hhqm/fall_guy_truck_hood_decal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475212/normal_5fff33db91da1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486537/normal_5fe52ea99a4e1.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/gjfajbF/clockwise_mobile_app.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/jggcSih/fapipasos.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/rieMChj/knights_fight_2_honor_glory_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sibamoxa/HZjgh8C/fake_video_call_for_scary_teachers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_6013b830f3f66.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/ifncwUi/13510158463.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://porilebunenagu.rf.gd/51144795161.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/aew_recap_bleacher_report.pdfIn PDF document text
    • http://zekakodususebu.epizy.com/2019677615.pdfIn PDF document text
    • http://xepalufozakot.epizy.com/63113989904.pdfIn PDF document text
    • http://jerovewoxisabu.epizy.com/tristana_guide_lolking.pdfIn PDF document text
    • http://boludit.rf.gd/32465945863.pdfIn PDF document text
    • http://damikofem.rf.gd/blackpink_logo_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/35885112178.pdfIn PDF document text
    • http://gigevowujuro.rf.gd/minn_kota_terrova_112_i_pilot_link.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/can_i_download_google_maps_for_offline_use_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/twin_xl_platform_bed_plans.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_off0000df44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF44 5248 bytes
SHA-256: 41b33f159d87fde652009765fc914b7c0eb89c2f805b76915b7d30c01028c11a
font_01_sfnt_off0000f0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FE 10644 bytes
SHA-256: 361c2d14c7b940910046a8a39b831f0082113064dc9e1071e3604ba3d74b5d79

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