Malicious PDF — malware analysis report

Static analysis result for SHA-256 9234df663a5c8763…

MALICIOUS

PDF

72.4 KB Created: 2021-03-05 14:45:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7ea237cec2993793823176ef36753f2d SHA-1: 42d50eb2915eee5162957fe148aded8286587428 SHA-256: 9234df663a5c87631ff1c50d0838f57608dc2965165a3fbf01c05e64d8cff3e4
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, appears to reference a 'boil water notice update', suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=boynton+beach+boil+water+notice+update PDF link annotation
    • https://cdn.sqhk.co/buwisotubu/Wwhjiid/a_ball_is_freely_falling_under_gravity.pdfIn PDF document text
    • https://cdn.sqhk.co/poladejug/hDEUgg2/horror_skins_for_minecraft_pc_bedrock.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/3ibjiCF/texas_parks_and_wildlife_magazine_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/dQe3mhb/beholder_game_apk_free_download.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/37349532020.pdfIn PDF document text
    • https://cdn.sqhk.co/surofowudula/dGClnje/49583639011.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/joyetech_evic_vtc_mini_75w.pdfIn PDF document text
    • http://memajale.epizy.com/kawasaki_z900rs_cafe_racer_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/bally_sagoo_all_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/adobe_portfolio_templates_free.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/lenajujoduwipeduri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/631da42b-87a9-4890-873c-2aba72b065b5/what_are_some_words_to_describe_poetry.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/mubopebazedexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5578a1c4-4a5b-41fd-9276-3ee233ea1b81/40689241708.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/piano_sheet_music_chopsticks_duet.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/books_like_the_eyes_of_the_dragon_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b00cc654-90d3-4cad-9a17-e734a76d8333/bose_model_av3-2-1ii_media_center_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/adobe_reader_offline_installer_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b2f1500-1d48-4c57-b717-18c3ad10c2e9/why_does_my_bose_soundlink_keep_turning_off.pdfIn PDF document text
    • http://posugez.epizy.com/fellowes_powershred_79ci_16-_sheet_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b489f258-629e-4671-ab1e-4a260a6f1601/conversations_in_american_literature_answers.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_off0000df78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF78 5368 bytes
SHA-256: cafca201b3524091d62b00aa6e7d4fe3df53e80b4a6b595f3cc9543cfe0a4bc9
font_01_sfnt_off0000f1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C7 10152 bytes
SHA-256: 0d1b4f9bb34739bbba1dd625a52985ac301ce9866b6f3aa4d6e37d91b299ce39

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