Malicious PDF — malware analysis report

Static analysis result for SHA-256 6454c461ef5a0966…

MALICIOUS

PDF

64.0 KB Created: 2021-02-26 21:34:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f8550b46fa4e6fde05385b49890ac3ec SHA-1: 503d398f08864c9d89cddfd101ecd2aa2ee20bff SHA-256: 6454c461ef5a09662e7b7910bbf6bdbcfe7e72f6029acffb0312f585aa9a9326
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple external URLs, with one specifically noted as a link farm on disposable hosting, indicating a potential phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or credential harvesting attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9099

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://xajibur.ru/award?keyword=shark+vacuum+cleaner+instructions PDF link annotation
    • http://copyrightsupport-ig.com/22681667463k1ezm.pdfIn PDF document text
    • http://gopururin.iblogger.org/abp_live_bengali.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/javascript_error_referenceerror_require_is_not_definednfsm9.pdfIn PDF document text
    • http://goldstein.berlin/list_all_the_books_of_the_bible_in_the_order_of_its_chronological_arrangementnxjlf.pdfIn PDF document text
    • http://makamar.xyz/nojatuwisomehlmz3.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/42779088662.pdfIn PDF document text
    • http://onlinetyz.xyz/kindle_chinese_dictionary5b31r.pdfIn PDF document text
    • http://money-team.site/675981945734iwf9.pdfIn PDF document text
    • http://ejinaya.com/company_safety_slogans_in_kannadafgov8.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/tamil_actor_movies_2018.pdfIn PDF document text
    • http://zabukek.rf.gd/algebraic_fractions_worksheets_tes.pdfIn PDF document text
    • http://vipezexazagi.epizy.com/loluminemitazolibiv.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/rivukuwu.pdfIn PDF document text
    • http://sufotef.rf.gd/87916884616.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/bloc_de_notas_android_studio.pdfIn PDF document text
    • http://dazulenaredon.rf.gd/87769475940.pdfIn PDF document text

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