Malicious PDF — malware analysis report

Static analysis result for SHA-256 6649120aa05cc05c…

MALICIOUS

PDF

124.7 KB Created: 2021-09-14 09:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 7ae5b28d6586a61b13971c8224468ce6 SHA-1: f3f006d3873870ab7045373de4b84f79e6b9cddf SHA-256: 6649120aa05cc05ccf4fa7c7a32af9283e086d8ad24f1ea80a059786fcd78ee3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The presence of external URI heuristics and embedded URLs strongly suggests the document's purpose is to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6937

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://irlanc.ru/uplcv?utm_term=android+custom+listview+tutorial PDF link annotation
    • https://vasantviharproperties.com/userfiles/file/44578182305.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/ha7i6giq6gpv34lag8iic1j8qq/kisevexivedapisubu.pdfIn PDF document text
    • http://defhjdr.friend-match.com/upload/files/29903290205.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613fadfd77b82---panujaginevodenasiriv.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/kapelixifamow.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/divuzibatogexanebef.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/37115054989.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/gilotigavo.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/21205751591.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebb7f2b685---ledojagitogut.pdfIn PDF document text
    • http://zamaro.cz/images/fcke_files/file/134In PDF document text

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