Malicious PDF — malware analysis report

Static analysis result for SHA-256 65eb3b8bee810898…

MALICIOUS

PDF

60.1 KB Created: 2021-08-23 10:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6059c12fa5bccf49976e6f043d68bf98 SHA-1: 512638de0d8ba615e591113e337a77e1d6d4b711 SHA-256: 65eb3b8bee8108980e69885c87a3141f3b22b4cd9ad0ea7dc7ac361c17e388b5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several heuristics indicating it functions as a link farm. Some of these links point to compromised CMS upload storage or disposable hosting, suggesting a malicious intent to lure users to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6927

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://oddluzanie.net/userfiles/file/38161152779.pdf In PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606da3e8d1300---80699434208.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/gaikjcidbi7dhi0lj8f8415qq7/tozitatukukede.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/kutapoguwaxidadaz.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090617b6c3f3---tizivawubomeviperole.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/mawujusipunuludilawijuv.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082fb802ecf8---29901339017.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609d7090b176a---fivezike.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/vodeguk.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/30252691235.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/2d3s223nbptur6qciqnku2i4mc/66532660235.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/981957749ecfe6aebe67a8450a4b74df/womigefes.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/50003004035.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/78477367665.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764c1aace3d---muxufikele.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e18841fd7---vepegifosalomurerox.pdfIn PDF document text
    • https://cncunse.com/d/files/fenojofejojojubavilav.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/3mb9f5ganb83qvsm0p7m7egseh/xilelujusetozovitonaxar.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077bef07b74a---2922926575.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/76191290074.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/69826438811.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/d415baa2466428516d5b45be05b6fc5b/wetepulotekefozeme.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a7541653ada---68433489889.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/70715364418.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/mefaxigazojarugegire.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=subject+and+object+questions+exercise+1PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1