Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b367618ea78edc…

MALICIOUS

PDF

79.6 KB Created: 2021-04-01 16:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 168bda84f7f9e208b27e19db6604b26b SHA-1: 7d685951c85351fe51908d98643202fea3e689f1 SHA-256: f2b367618ea78edc852a48e038e7d47b43eebf4ae2a7e46af583e5a98079bdd7
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains an embedded URL pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'browser firefox free', aligning with a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=browser+firefox++free
    • http://gasurorir.sportsontheweb.net/characterization_worksheets.pdf
    • http://fb-copyright-help-from.com/vanobedexepedaxegupefewtj3o.pdf
    • http://xrootunited.com/psychiatric_mental_health_nursing_certification_review_book2dy4x.pdf
    • http://sosiwawivijomo.scienceontheweb.net/retorosal.pdf
    • http://bejagofeteveba.22web.org/zovuwexarakimakakerotude.pdf
    • http://girepodemaz.getenjoyment.net/calendario_mensual_octubre_2020.pdf
    • http://punavuvipufov.sportsontheweb.net/black_hawk_down_music_list.pdf
    • http://notdull-eng.online/john_deere_42_inch_front_bladekjr0c.pdf
    • http://kositexujir.sportsontheweb.net/torelosajipe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0c9c6af0-e74f-4bde-abed-3f320d210f66/what_are_the_duties_of_project_management.pdf
    • https://uploads.strikinglycdn.com/files/d904db36-8489-48cc-96b7-70f0070d0615/othello_act_1_summary.pdf
    • http://bividit.rf.gd/sapusijoxusakujoda.pdf
    • https://uploads.strikinglycdn.com/files/2327ab0a-9c3c-4987-a457-21266d774469/childhoods_end_ending_explained.pdf
    • http://vebujameja.rf.gd/autoestima_baja_adolescentes.pdf
    • https://uploads.strikinglycdn.com/files/824544d9-ab6b-442b-b3b7-cc28bdf751e0/73012464176.pdf
    • https://s3.amazonaws.com/tunenijexe/anime_wallpaper_for_pc_free_hd.pdf
    • https://uploads.strikinglycdn.com/files/0303493b-f9fe-4991-80c4-96138dd35cd7/tokorezowukil.pdf
    • http://bopiguxa.atwebpages.com/58014165500.pdf
    • https://s3.amazonaws.com/jivamubug/forrester_report_on_advertising.pdf
    • http://xoxadexol.rf.gd/segobevebajagobatuguxu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb57.bin
1dcac72d49c09c5197a82e7ad13cef7d899fed470fd03e03a8224fd209560747		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB57 4728 bytes
font_01_sfnt_off00010b96.bin
ec75fe21fdcde1e5024d5821503835f98d6db21e7033519bdce2a48f1a5be7c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B96 10968 bytes

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