Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8aa56fc3ed822b4…

MALICIOUS

PDF

204.5 KB Created: 2021-04-08 06:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb3929aab15abcae521ad88d83f81f14 SHA-1: 12c05ed4b5cf320eb8d913831972d42932a0c80f SHA-256: e8aa56fc3ed822b47dbab69f657338b519e3dc477e47b174f190f3e13b8a735e
104 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pelibifir.ru/123?utm_term=astronomical+phenomena+for+the+year+2020+pdf
    • http://brosbass.com/wolfcamp_shale_formationttd32.pdf
    • https://laxonetamaj.weebly.com/uploads/1/3/4/0/134096763/f02279c6b99.pdf
    • http://nejupike.mygamesonline.org/nowagoteze.pdf
    • https://static.s123-cdn-static.com/uploads/4446647/normal_5fe0f52767b84.pdf
    • https://cdn-cms.f-static.net/uploads/4464871/normal_606b86b44fc59.pdf
    • http://fudoviwil.mywebcommunity.org/wordpress_redirect_to_login_page_after_login.pdf
    • http://vurovolapoza.mygamesonline.org/gorozelekutiwigijosel.pdf
    • http://iuts.space/free_tv_apps_for_ipad_canadaw0u2f.pdf
    • http://zexorusawuwurew.sportsontheweb.net/3502693251.pdf
    • https://static.s123-cdn-static.com/uploads/4408471/normal_5ffcf033212d0.pdf
    • http://nemipenekav.iblogger.org/diduzazivonivemukir.pdf
    • http://kersita.space/solving_two_step_inequalities_worksheet_8th_gradec1slv.pdf
    • https://lifoluzasodani.weebly.com/uploads/1/3/1/4/131437418/difejuvenaj_todafeneb_nekomuxafexir.pdf
    • https://cdn-cms.f-static.net/uploads/4402938/normal_603ab6abe3b8e.pdf
    • https://lewibodozibepa.weebly.com/uploads/1/3/3/9/133997785/5717858.pdf
    • http://fanutoragozogow.sportsontheweb.net/70559543970.pdf
    • http://digitalcalakk1.xyz/4102425450839pc5.pdf
    • https://mitigovoponezix.weebly.com/uploads/1/3/4/3/134375948/komitulipitak-papowixivuridi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://luwezotefu.rf.gd/takaxefudiroxajofeleg.pdf
    • https://s3.amazonaws.com/levumoduf/61570223195.pdf
    • https://s3.amazonaws.com/tutasujal/android_api_27_documentation.pdf
    • http://kirezujanavibos.epizy.com/77891864418.pdf
    • http://toralixeg.rf.gd/back_stretches_yoga.pdf
    • http://bewebumaxof.epizy.com/kinados.pdf
    • https://s3.amazonaws.com/pivetuzadujo/toto_washlet_toilet_models.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_off0002e938.bin
6e5683c6a5018db91f408d36a9fb663fe628cb3b220d0ddfc07c623138fd48e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E938 5760 bytes
font_01_sfnt_off0002fcba.bin
543b65b53bdf09794781c36bdcb55a66ed2d43be7a316ccf0879d1992289ab1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCBA 11396 bytes

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