Malicious PDF — malware analysis report

Static analysis result for SHA-256 72dab569c87f1ceb…

MALICIOUS

PDF

59.5 KB Created: 2021-08-15 20:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 93f868c30d0e959a156d951eaaa3ffbe SHA-1: 33956150a03a9c47453a6c17032e33d25b614e79 SHA-256: 72dab569c87f1ceb2eac0257dea12b1b0e185a37d63641c04bfe6b8dbf7f888d
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body is unreadable, but the heuristics and URLs confirm the nature of the attack as a link farm designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9802

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 http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/fc59605666eff505a50a793f6057f108/35481621403.pdf In PDF document text
    • http://propellerclubsandiego.org/uploads/files/31239477226.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160765e1bdb5a5---zadoxudetebozitol.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/8abqf0mg9rtshsuqoej0h94nq9/wupirusubosogopavu.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba1ec497c5---jumezuruma.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/32762786305.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/fovesutitilufesopijojati.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/nimodesivesaribupozifa.pdfIn PDF document text
    • https://t2sc.me/userfiles/gupofed.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/vetediwajibepujefoji.pdfIn PDF document text
    • http://rotang.net/userfiles/file/giminumexosiwenetate.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4c738cedcf629a021888815ca24caaf6/vutapokopavavoj.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/b8gsjggpcbbmu764ms1s0olp1f/69288702577.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/53673514635.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c511f74b5f6---libetopam.pdfIn PDF document text
    • http://topstec.com/d/files/zosizavivalode.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/puredonajuzifutonuraxawe.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4ufjjigsev791g1mj821tdqa57/26706388707.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/vexukonoxutuvizirim.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///47461711944.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c47d7ead4---dazigenulepovo.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/tuwexoru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=run+on+sentence+worksheet+high+schoolPDF link annotation

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