Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe51c9057ef0c21…

MALICIOUS

PDF

70.3 KB Created: 2021-09-17 22:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 048526199519b6fdb7583c8f03826269 SHA-1: 37cf7582e67a22a5f5b3f85a98e81cabfef517fb SHA-256: dbe51c9057ef0c21de7dccd49565f2869a6fe81ef9bea7285c9151087d888748
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous embedded URLs pointing to various domains, identified as a link farm, strongly suggests a phishing or malware distribution attempt. The document body was unreadable, but the overall structure and heuristic firings indicate a malicious intent to redirect users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5802

Heuristics 4

  • 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.
  • 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://thoitrangvabaoho.com/Images_upload/files/wowudaboxizomulugapaxeman.pdf In PDF document text
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/bavakawo.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/siwewopuda.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/tewaxupebujaregu.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/gimoki.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/89264274876.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/66204429345.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/kizoganeteladi.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/46248974266.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-8/20210908085455902985.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/37904686371.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/juzija.pdfIn PDF document text
    • https://sooryasales.com/uploads/file/69074596658.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210905141027.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/28451184370.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/87485367775.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/32674655326.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021091207224339.pdfIn PDF document text
    • http://aptekadc.pl/userfiles/userfile/zuforariwo.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/radusafifivemagasibega.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee8b89cefe---86918025572.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/52046041357.pdfIn PDF document text
    • https://gfwofficial.com/ck_imgs/files/90555091046.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=galaxy+s4+factory+resetPDF link annotation