Malicious PDF — malware analysis report

Static analysis result for SHA-256 b689a5f826286114…

MALICIOUS

PDF

79.7 KB Created: 2021-08-17 20:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ed8ae7700cc3f00a081a47fa0f8157f8 SHA-1: c9d2545f130d774516d3055383897d7420c0862b SHA-256: b689a5f826286114d0f2b73691f3c58c2a746c9891c34c9cbaaee327ed4b5516
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The PDF also features a link farm pointing to compromised WordPress upload storage, indicating an attempt to host and distribute malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6411

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf3b196481---gosijuk.pdf In PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/lojajejupagerixufibemo.pdfIn PDF document text
    • http://dzbnf.com/upload/file///sekaxuzetimodipojivuxanoz.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111654443a56---95709976127.pdfIn PDF document text
    • https://onelineservice.it/file/pizojofemezawi.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210803_EA4AA95F060D970F.pdfIn PDF document text
    • http://lungtransplantopen.com/clients/d/de/de7cc03d42bda6b8b84c8ac9728529bb/File/mizisetamiruzelamigar.pdfIn PDF document text
    • http://generoussecurity.com/uploads/13313563809.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/53755942685.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/qpl88h85el2tn99va94sjbq6oo/10173387880.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/83276076663.pdfIn PDF document text
    • https://eclearusa.com/images/file/kenugitusowenobunudovenos.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/xezutosuwufilamalitazax.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5990f50abb17ba5d320f8d3eb50bce00/xozamezilotizi.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/0b9ebf482c614817d791433c69653a7b/23488263363.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/95319444686.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/5b41011ea1b0ad8e7676ff7cd82bf1ff/xamunajetupun.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/pupanidavowivojelu.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/4j3pja8v2vbfg9lq4rj0l6hk00/87320608866.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610e179f7759a---97122275732.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f035d5b43c---fegobaxipifitunaragisu.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d61a2f983e7---73105327758.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/tonilepoxetaso.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5be16ec55d---2097743033.pdfIn PDF document text
    • https://cargobull.cz/res/file/jefitugotononifudewufoto.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/dekulegoxivurerotitifofaj.pdfIn PDF document text
    • https://506hlapeta.com/files/file/labapazofawobumegaxuk.pdfIn PDF document text
    • https://rcot.org/userfiles/file/47658799802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=como+descargar+libros+gratis+pdf+sin+registrarsePDF 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_off000105e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E7 11132 bytes
SHA-256: bab9beba86807e25a974f470fad84d95357cfd476fcc6239a5b35e8021f2920f