Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63c7d23f1173fab…

MALICIOUS

PDF

77.8 KB Created: 2021-03-25 02:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7898fdff0f4e09df9ebee062200ad11f SHA-1: bb9d09cfe6c4f1b79b5087a4bc69797a12120dcf SHA-256: f63c7d23f1173fab86574d57e12a946425704e486ecd8b35ed7461d1f639056c
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one specifically pointing to 'resalured.ru', suggesting a phishing or malware distribution attempt. The PDF's structure and the presence of external links align with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/123?utm_term=map+of+africa+blank+pdf PDF link annotation
    • http://filiwim.22web.org/swayam_prabha.pdfIn PDF document text
    • http://sokuzise.iblogger.org/barreras_administrativas_de_la_comunicacion.pdfIn PDF document text
    • http://xobaxibudizoba.22web.org/31815954515.pdfIn PDF document text
    • http://jedugefipevama.iblogger.org/ipl_games_2018_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_6dd7e164f8a54221ad3777d3e09fc6f2.pdf?index=trueIn PDF document text
    • http://dokelegusipodi.epizy.com/2005_nissan_pathfinder_seats_fold_down.pdfIn PDF document text
    • http://mujedofagogi.epizy.com/98747627157.pdfIn PDF document text
    • http://wozojarigirodo.rf.gd/new_headway_beginner_third_edition_teacher_book.pdfIn PDF document text
    • http://lamumabazekutum.epizy.com/xizoganowulapigiz.pdfIn PDF document text
    • http://zerujafulo.rf.gd/android_mobile_backup_app_free.pdfIn PDF document text
    • http://jewuvebasabam.rf.gd/interpreter_of_maladies_theme.pdfIn PDF document text
    • http://ripomozenawigi.rf.gd/logo_quiz_level_39_answers.pdfIn PDF document text
    • http://zerakunutage.epizy.com/90693805848.pdfIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_5e6fa8618ed74693bbedb4f635a71ed4.pdf?index=trueIn PDF document text
    • https://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_6f8c9a3fcfd441c383b1d2d0199db975.pdf?index=trueIn PDF document text
    • http://teposobuzifedug.rf.gd/09g_transmission_valve_body_torque_specs.pdfIn PDF document text
    • https://1794ee33-230d-455b-98b1-84d48067edce.filesusr.com/ugd/551769_14afe869690648c093f5a5778456ec94.pdf?index=trueIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_cd569bce7b62489c952d1a4f2cfbe674.pdf?index=trueIn PDF document text
    • http://fejoxinivume.rf.gd/gadipisupawudabofofok.pdfIn PDF document text
    • http://fosufozixa.rf.gd/nukowilo.pdfIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_e4e515e39da24e108c519f6023e6746a.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF330 5180 bytes
SHA-256: 32c2f858e5e1e3be41b250249612380706d533f079e63bf809d60f7133d91e19
font_01_sfnt_off000104ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EA 10972 bytes
SHA-256: dfe79df31d370cf87a3934a9c22eecbf1b75262d7438bda63c98a598dda78509

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