Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1be4b319b62cec5…

MALICIOUS

PDF

55.6 KB Created: 2021-09-20 04:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f965718c9d5f632ad3b6e5343ad0dfd9 SHA-1: 949f39cc172f93e656829d474fa7ad47ceb9980a SHA-256: d1be4b319b62cec59e5d930466d6c97e2fce5175937b05eed37768d7d9ea62b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are hosted on disposable or compromised infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6128

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://formel1vermietung.de/userfiles/file/44195327681.pdf In PDF document text
    • https://wisestudentz.com/userfiles/file/liwilasibojenemolezusuw.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/gakisafebagiki.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/gubarijit.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/zitodobad.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/bonijeg.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/66693403703.pdfIn PDF document text
    • http://signauction.net/userfiles/file/remajow.pdfIn PDF document text
    • http://ortopediaszombathely.hu/editor_up/mapuvujojogexab.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/rarimevebopomokuwofojebig.pdfIn PDF document text
    • http://canadianrockies.info/files/file/48172003650.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/h8c4kbj4rehh28oo7ul7ncsoq4/25936787966.pdfIn PDF document text
    • https://bike-accessories.supersites.gr/content/ckfinder/files/61844614769.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143d6d7e2923---86650222604.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/vilupekimozufij.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/73139835176.pdfIn PDF document text
    • http://aquatherm-graz.at/files/kulidegewikabidaze.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/22249335122.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/45d342eac7271fd73789bf7a4729dbfd/83736036281.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/70702897151.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/6896918289.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/zudomililizibozomel.pdfIn PDF document text
    • https://istanajp.com/contents/files/63878303957.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/gafuduwasetikareriwoda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=pokemon+soul+silver+cheats+openemuPDF link annotation

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