Malicious PDF — malware analysis report

Static analysis result for SHA-256 47288f7d94549f63…

MALICIOUS

PDF

53.0 KB Created: 2021-09-17 13:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9552a4987541b5ac74f594c5162155b4 SHA-1: c682b68c11388818140a2af16a2fe54a738962d8 SHA-256: 47288f7d94549f634cfe5ddc55c1d7014980f73d32a8f1dd030c5b19f7d2b756
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external URLs, many of which point to disposable hosting and appear to be part of a link farm. The embedded JavaScript likely serves to obfuscate the malicious intent or to directly execute further malicious actions, such as downloading additional payloads or redirecting the user. The numerous URLs suggest an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8038

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=dragon+mania+download+hack PDF link annotation
    • http://rockycheng.com/ckfinder/userfiles/files/8865363310.pdfIn PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/kimupevutubupekogexudopak.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/90643647121.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/97254075719.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/jagilo.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/30006396253.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210904004308_1899626140.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/fozemokijesem.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/33470088498.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/duborupofomaninikazur.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/migapanokigibisapizeg.pdfIn PDF document text
    • http://zeci.nl/im/image/zitinudetawijotipi.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/36115822849.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/9e9437cd1262446b4aa631e927627f2e/norumatalufuzesaxuse.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/suxapatadajeved.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/42631526557.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/janedivalumadupagibixa.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e6b04f87d---30335730693.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/30194596459.pdfIn PDF document text