Malicious PDF — malware analysis report

Static analysis result for SHA-256 1737c3be1c6ed52c…

MALICIOUS

PDF

87.2 KB Created: 2021-03-26 10:42:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 021a2e8f478806e86e739efd3c79785e SHA-1: ea418dce7726e9d3e92dc06ce7c0403c897f85f0 SHA-256: 1737c3be1c6ed52cad33c1659bfd55609ab7016b81a04c7bfba00589903da0de
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'botokaw.ru' and containing a query parameter suggesting a lure related to 'cedar point gold pass information'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of multiple external links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest the document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://botokaw.ru/123?utm_term=cedar+point+gold+pass+information
    • https://cdn-cms.f-static.net/uploads/4369766/normal_6039594fcad52.pdf
    • http://powerpoint4you.ru/admob_banner_integration_androidsv6dt.pdf
    • https://posodukur.weebly.com/uploads/1/3/4/3/134347560/rewebalujokefib.pdf
    • http://contact-git.top/endocrine_society_of_sri_lanka_guidelinese3rly.pdf
    • https://static.s123-cdn-static.com/uploads/4469104/normal_5ff1b7b44969c.pdf
    • https://vatovuturok.weebly.com/uploads/1/3/1/8/131856009/9d4ee6.pdf
    • https://static.s123-cdn-static.com/uploads/4485157/normal_5ffacc6c5c5fa.pdf
    • http://moresukko.ru/436375577682r17w.pdf
    • http://meweremidef.iblogger.org/35502856554.pdf
    • http://reduslim-officialsite.site/fabokokakupebiwusudoxwg49.pdf
    • http://dimoguzix.iblogger.org/what_does_the_term_sunshine_mean.pdf
    • https://static.s123-cdn-static.com/uploads/4365599/normal_60084a8c54596.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_b90c4173771d476882488aec8bb969bf.pdf?index=true
    • http://rupiroliwon.epizy.com/coldplay_yellow_sheet_music.pdf
    • http://rikaxusajojoba.epizy.com/43454612491.pdf
    • http://kemolazovejuru.epizy.com/arduino_uno_programming_download.pdf
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_599c5d5181d047e3b37f837762446e8e.pdf?index=true
    • http://pojunusojazop.epizy.com/estadistica_para_negocios_y_economia_anderson_11_edicion_solucionario.pdf
    • http://sarupisegov.rf.gd/curso_catia_damasceno.pdf
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_a8f0a4eda31c4f1da174c5f87ef2b812.pdf?index=true
    • http://famovuwozagomo.epizy.com/fisco_agenda_2020.pdf
    • https://1a413096-4115-453c-84a6-e19f3d0a1e7a.filesusr.com/ugd/4a2d03_10b9030f5e854f0ea324ccfe1f28cc26.pdf?index=true
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_c0e04ea344b045a9b6bc0c753eb1f11f.pdf?index=true
    • http://weralawubuzeg.epizy.com/academic_writing_practice_for_ielts_sam_mccarter.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010184.bin
8dde70813f5a52f7d5a1fb7e424cafb7742e26ed90703748c77dd6eb533feb81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10184 5268 bytes
font_01_sfnt_off00011357.bin
9f24c2c53b3ef56a132d21f42b8678e22a02e1d78cb810e75e3d83d2fbac0b55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11357 11612 bytes
font_02_sfnt_off00013a40.bin
d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A40 16060 bytes

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