Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a97aab80dc0dc32…

MALICIOUS

PDF

60.9 KB Created: 2021-09-11 01:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f3f3606c232f6ffd5f25379764303dfd SHA-1: 1a3348273276af00bf494b7e7fb0a3a5dca9167c SHA-256: 5a97aab80dc0dc322e852c6b4dcfbfad01d6250867ed3e65667effb545f99a62
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains a large number of embedded URLs, many of which point to disposable domains, suggesting a link farm or phishing campaign. The presence of `utm_term` parameters in some URLs further supports the idea of tracking user interactions for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7119

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://allytemp.ru/uplcv?utm_term=good+movie+maker+apps+for+android PDF link annotation
    • http://oilmachineydy.com/d/files/vuwigakotixoli.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/17193175850.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/35249172697.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/lojesitujidof.pdfIn PDF document text
    • https://phu-komplex.pl/pliki/file/xopapoboligepokazivedit.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/femipegixiwujizosolenop.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210911065226.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/pebetotarudewewoxetepa.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/kavutobimutegefokopod.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/92734526461381b3f67b12.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/17878926875.pdfIn PDF document text
    • http://buyyoutubesubscribers.com/ci/userfiles/files/midipojoduzotamukakugi.pdfIn PDF document text
    • http://denprokhorov.ru/images/file/xegegolupuxalibenidof.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/sagunekibiwulokosabesavo.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/10523884743.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/lazamigoxesoponut.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/3a2997d5e3b84b17b4e9ad27d8e1c7e7/90777618429.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210910192127.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/14576888110.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/83467248693.pdfIn PDF document text