Malicious PDF — malware analysis report

Static analysis result for SHA-256 250808349308dfd5…

MALICIOUS

PDF

77.3 KB Created: 2021-03-31 21:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c2bb7a882ff328620cd197507bacd94 SHA-1: 26a21fb830686462ef31ee9a82cf27ab8a6f1e6e SHA-256: 250808349308dfd53c969771aa50973c69baa82317c459aaf0f4476233bd38cc
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a malicious domain. The document body, though heavily obfuscated, suggests a lure related to educational worksheets. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://mezovuduw.ru/wix?keyword=angle+of+elevation+and+depression+word+problems+worksheet+pdf
    • https://cdn.sqhk.co/vinogusi/YTiiuie/goduzefak.pdf
    • http://idealica-columbia.site/tarumurikopawovimaxikujvwx1.pdf
    • http://gofofikazujepav.22web.org/43371535758.pdf
    • http://bestrongbyg.com/kilarilapuwomovobowimokip8on6.pdf
    • http://itactical.xyz/mevonar8qo4o.pdf
    • http://gefaveje.22web.org/31568224794.pdf
    • http://goproits.com/does_allegiant_have_free_baggage_for_militaryqb6jf.pdf
    • http://reggis.info/66688437801wlld7.pdf
    • http://zoo-taxi.site/91615010119q9s69.pdf
    • https://cdn.sqhk.co/ribegibonot/VQs57hK/hustle_castle_arena_store_prices.pdf
    • http://titoto.xyz/bible_study_topics_for_beginnersnwfjb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lasesesavobopom.rf.gd/one_with_you_sylvia_day_ending.pdf
    • http://niwuzowebod.epizy.com/how_to_make_money_as_a_beginner_programmer.pdf
    • http://bopunuzas.rf.gd/xezugikamogo.pdf
    • http://wofiriperajune.epizy.com/50518244431.pdf
    • http://towomufovad.epizy.com/72725262603.pdf
    • http://zonefodewev.rf.gd/49284569585.pdf
    • http://fixiwerasame.rf.gd/cv_template_for_teaching_assistant.pdf
    • http://tasijojaludet.rf.gd/denibelozozuw.pdf
    • http://lepefefila.epizy.com/dilarunewerunobamopu.pdf
    • http://ponowuvibux.epizy.com/61034977266.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_off0000eb8f.bin
8cee323d5b66feb5b9273f3940a7be73969f18d841f3c2ba7d474e48bd0f05e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8F 5800 bytes
font_01_sfnt_off0000ff35.bin
f62e9866a754d124d9a63d548acbbb1bbb4f316979bd19dcf3e441317d3f6540		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF35 11168 bytes

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