Malicious PDF — malware analysis report

Static analysis result for SHA-256 8483a3a42ad7bff9…

MALICIOUS

PDF

74.9 KB Created: 2021-09-07 22:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0ef5cd5012f43b13e37a56cd60fb9cca SHA-1: 0b334f3f2ca7b767ff03dcc79a5b4bddccac251d SHA-256: 8483a3a42ad7bff9ea36d0bb1e4ee6621db6e8e84e3f8dbeb295b57fb281e1e5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the 'Phishing.Trojan' detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7511

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://travelport.pl/userfiles//file/verubejolek.pdf In PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7dcf10d32---gozezulogesotof.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/petoguwipig.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/weroxewonokivedekoniw.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b6f02c65b---55537682385.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/73207314993.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210526205225.pdfIn PDF document text
    • http://nhandieurangmuoi.com/ckfinder/userfiles/files/kowoguredosex.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/6554841833.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/65664738225.pdfIn PDF document text
    • https://floridahouselottery.com/test/userfiles/file/xejenigagiru.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/48083445475.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f35bb70c0cf---6267690263.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/0ee1dbf2615cd1acb427f1d44f077850/1076647728.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/5a008ac438e379f50b0987d36afe5e7a/fiwedewozoperil.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/23335059033.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/47862531096.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/wixuzuvuw.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/lenitawuf.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4d7edac4a---mosufigux.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081027f1bb3f---jazazarifo.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/nodurosopebevibis.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16093d4a65a000---17977524065.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=telecharger+des+livres+pour+apprendre+l%27anglais+gratuitement+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0C 11232 bytes
SHA-256: ec9182a94a36f53a5a2f30ec617c9b64fbf12e14258f691f244f1fc0401103b1
font_01_sfnt_off0000f40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40C 21676 bytes
SHA-256: 30a141c2664f7d16d8421b53199b0d77aa4a01f540c41480c5a8b454eed33df6