Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba6ba7ba049b053…

MALICIOUS

PDF

63.7 KB Created: 2021-09-09 09:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5ab687c47bf7c10bb95568bab1f03d8c SHA-1: a07b5a3017f87501cef6f9325f481dc63263cc4f SHA-256: 5ba6ba7ba049b05310928a391cf81adb4cc27bcdf6e1bd1eac6a05cb35701376
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF, likely used for phishing or distributing further malicious content via the linked URLs. The sample's structure and the presence of a link farm on disposable hosting further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6902

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 https://smidgel.ru/uplcv?utm_term=apk+wifi+password+breaker PDF link annotation
    • http://caycanh.vn/images/fck/file/23224921987.pdfIn PDF document text
    • http://i-physiology.ru/upload/36828722460.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/48303767576.pdfIn PDF document text
    • http://hcwan.com/userfiles/file/kodutebatomugotosobilas.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/rapara.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/dedafolop.pdfIn PDF document text
    • https://ibextrail.com/editor-images/53342343006.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/ab70d98e9269165332800fbaa9f47179/20868835916.pdfIn PDF document text
    • http://eros-arena.name/eros/userfiles/file/34665448901.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/88375766989.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210901095549.pdfIn PDF document text
    • http://vrakskodamnetice.cz/file/lixoxapawoxefu.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/sewufofosejuzamoga.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ae6949ab0---39032962251.pdfIn PDF document text
    • http://sinners-party.de/media/file/kotuzesokuk.pdfIn PDF document text
    • http://mbfeed.vn/upload/files/17521012946.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/24369216647.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/kuxugi.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/xeledefuxoxotomirilab.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/bodasakutelaxa.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/sozokizafoja.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/80425156716.pdfIn PDF document text
    • http://cdio.vn/uploads/userfiles/file/7233909565.pdfIn PDF document text
    • 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_off0000cf8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8B 16964 bytes
SHA-256: 47b6e60b1485d5f3bb506bf4b00c6d2dccb9c6247dae0e36acdf75411501bfb7

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