Malicious PDF — malware analysis report

Static analysis result for SHA-256 18cbbd5fc2843952…

MALICIOUS

PDF

63.7 KB Created: 2021-09-06 06:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 139a90795314794aff12fbce0b214a33 SHA-1: 8fab33308ffcebbc70a58117ed6f33398d03032f SHA-256: 18cbbd5fc2843952fd82a09ad5ffbe93786331318f97ca8b5b8052ffc79503d8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of external URIs and the heuristic findings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4625

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
  • 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.
  • 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://archism.ru/uplcv?utm_term=naturalistic+inquiry+lincoln+guba+pdf PDF link annotation
    • http://makesrealsense.com/ckfinder/userfiles/files/kotagokelokuz.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160842a27444b7---36219951132.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3227e2e7e---86513831738.pdfIn PDF document text
    • http://duhochmis.com/files/uploaded/files/30886970057.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/60556387536.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ce722c55b---19209923725.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/c4537fc2a6ff746a2a73531b5aeefa43/68420845395.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cdf29eafc---88039128220.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/rujuwafivudegevuva.pdfIn PDF document text
    • https://chp-travel.ir/data/file/dojigoladazonenubifurugu.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/68431797260.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/5mb1320c3m2asaib09lgenc4h0/65403675980.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/topisilinugerefa.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8ebdc1f52a52f7fa6ba5acc30a350bda/waxelixepelodebilimik.pdfIn PDF document text
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/mekuxogogixeraruneveji.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16207849203935.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/90415170279.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/ditokanekupawelibeg.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68bdeb3f27---28485465214.pdfIn PDF document text
    • https://lifetides.ca/cambridge/uploads/files/97843511894.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/42165100247.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/8cd8926289586e12c19ad08ab4d1da05/4418436730.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/morexunor.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ced4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED4 11140 bytes
SHA-256: 8e7deffd75ac9e37a5e47c5cd613db20a59e5a5230c8f0dc8c3f64925955c907

Open this report in the interactive analyzer, or submit your own file for analysis.