Malicious PDF — malware analysis report

Static analysis result for SHA-256 682c8e18c4f900a2…

MALICIOUS

PDF

65.5 KB Created: 2021-09-23 02:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 62de80617f1138eefe90e449ab8749ad SHA-1: 30a6aa4a159136b22ca910446732b2c46da875b4 SHA-256: 682c8e18c4f900a2153c452181c52e94eedea57eab7dc18c425304d48a32207f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple distinct links, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6381

Heuristics 4

  • 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.
  • 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://muzeumkonstancina.pl/attachments/file/dapanexubumilefovaxi.pdf In PDF document text
    • http://nhadatv.com/webroot/img/files/jaxepirogano.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/bajeratelunulekopeguretaf.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/toxetaw.pdfIn PDF document text
    • http://turatabor.hu/media/33344524458.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/kodogulojukivatopol.pdfIn PDF document text
    • http://warwick-ems.org/userfiles/file/dufipi.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/ripej.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/dixonerilotutule.pdfIn PDF document text
    • http://cesarrodarte.com/userfiles/file/zogepi.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/df4e03prrt1iqmc2prhdavlvrl/nakakorobuxafunoxo.pdfIn PDF document text
    • https://hearing-outlet.com/uploads/files/202109160459206714.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/19639739758.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/wekagigiwosavimotel.pdfIn PDF document text
    • http://oa30us.com/userfiles/file/duxijifemebegodun.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/mizuguresabepikuteg.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/58cbe1e5747a842364f5d03d094613aa/8325762427.pdfIn PDF document text
    • https://harom.ro/files/file/ralilizutonir.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/tarijibawupelufukawe.pdfIn PDF document text
    • http://321eastern-thailand.com/userfiles/files/54201520534.pdfIn PDF document text
    • http://azinsaghf.com/cache/fck_files/file/7235645521.pdfIn PDF document text
    • http://i-tos.com/userData/board/file/18399082500.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/vopufoxunugu.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/ronazadolifuvelurofirog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+open+moto+e+2nd+gen+back+coverPDF link annotation