Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3cce2cacf77a5b…

MALICIOUS

PDF

148.4 KB Created: 2021-08-26 04:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d1a6d5aa91ea7d9b9fa703c4f85f4f5d SHA-1: 6ce0f15273c8cef833cd9cc4677deff865711255 SHA-256: 2b3cce2cacf77a5bde820e26b3fd8c949f585b4185168be88adcd0bd57b44d13
154 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or redirect users. The presence of these links suggests an attempt to exploit users by directing them to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8292

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c7bb87108---96732099203.pdf In PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/3831946953.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921bd392026---72716370418.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/sejobegiwebox.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/xoxudilelatekaj.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608248d05e000---rikixiruki.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f59e8dc257---lirabowazuxinafetegapep.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/2c6qph7qlntonm7umd73g4ihu6/79229046232.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/zuruburuduvuv.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/7e22ecbc16f02ccf197b6da586287e3d/feradezukitewenulozi.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606fddf813230---65965083286.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16071f7500b100---gogene.pdfIn PDF document text
    • https://afayl.com/userfiles/file/26620417118.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/62547775017.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/60301610256.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e89f193555---maseneditutosotilasa.pdfIn PDF document text
    • http://krzeptowski.pl/file/rejalusebunopatinem.pdfIn PDF document text
    • https://hostingalani.com/calisma2/files/uploads/gejijevagiwuregim.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/87551460030.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/vovawomizib.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/3a562b8ddb7aefb540f8bb850c9d1228/dorewegewa.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607406afe8692---19876679811.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/vupeka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=what+does+love+stand+forPDF 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_off0001efa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EFA8 23220 bytes
SHA-256: 206ab258f5a6f5036ec63ca34877f330f07c061e7d144131953fcab930bac6f5
font_01_sfnt_off000228d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x228D7 16412 bytes
SHA-256: f56955aede106b8a1ec05ffdeea5100839d7ea02570a32af565baac6f65454db

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