Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6b9de152233263…

MALICIOUS

PDF

72.0 KB Created: 2021-09-09 22:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3fb61b56265fe4f22f24cc84856a0f98 SHA-1: 7b7baeb5a64c8c09e67d73bb7cc0998528746f45 SHA-256: de6b9de15223326352f8561db6951ed54b2defd86f69d360ea80c0d39a1658a4
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting the user to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6626

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://clinicaveterinariasangiacomo.it/userfiles/files/wulavegosilotudupu.pdf In PDF document text
    • http://tiendanatacion.com/noticias/files/sutivepadepojixujavem.pdfIn PDF document text
    • http://zubrcup.by/files/files/feluramurifatadazuwi.pdfIn PDF document text
    • http://altronic.pl/!mag2011/userfiles/file/gaxamalixakov.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/nudinurezunopovasedaz.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/rolikubapexexesa.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/17364253124.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/36277553719.pdfIn PDF document text
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/dowixifiz.pdfIn PDF document text
    • http://boldogelet.hu/media/rotejatonadaxepatipan.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/91566800562.pdfIn PDF document text
    • http://medrea.ru/upload/files/domixunowaxenuzarizegu.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/juvujitawerajowif.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/73683090575.pdfIn PDF document text
    • https://typeone.com.my/ckfinder/userfiles/files/58418623283.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/vanagigoluwebosugiruxol.pdfIn PDF document text
    • https://ka-base.no/images_content/file/82296223872.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/74981035481.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/mivanezeluv.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/21393328145.pdfIn PDF document text
    • http://erpos.sk/data/files/gapum.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/57a3d2221db807297f557895a16f04ee/sipigefogurixota.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/birijepezabix.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/12951325955.pdfIn PDF document text
    • http://pnc21.com/files/fckeditor/file/20687197613609bf0a4dc.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=avengers+endgame+english+movierulzPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE3 19976 bytes
SHA-256: 4fe937f0d8f38ef93cbe371ecf95e4fedaa0d67d5e119e37b397c60034563dc9

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