Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbf743da92ad551…

MALICIOUS

PDF

152.4 KB Created: 2021-06-26 04:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 237a85a6ec7f0e0ed5819308b2b01082 SHA-1: 101eb03be3b16406653028ab79b1c0303de1e8e0 SHA-256: ebbf743da92ad551d692aa778af09b76b2a517c229b2f634f157a395ced16198
124 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites. The ClamAV detection 'Pdf.Phishing.Trojan' and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malicious distribution intent. The file's structure suggests it's designed to lure users into clicking these links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0439

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://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d26050cad6a---61058833674.pdf In PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/0ea36c928fdffb7e523987a1482dc1f3/tijoxix.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7816df96f---namapuzoli.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/bodevobe.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbedb0ed82---18167303860.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/6080561348.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/152bb30614d9b8181bcd9c2ef27a38c7/feremazedaposudazezowe.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/3127ff106c9ef06762ed3e0c09330f48/nubivenige.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/69e3b5a7ff1aa6ae16bcea531f371625/11298051915.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/64480943332.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3c973bced---93430804288.pdfIn PDF document text
    • https://manenshop.com/upload/files/felopemelogofaw.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/24a98e0472e34104ef1406f42edafd56/mugam.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/72f281ecdb17136e9d06fed8ca536bc6/zuxuxinuwewelusijusatef.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d29c54ba2---7263333961.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c25c0979e86---tokuxilukilesu.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099df86aa37d---16662282591.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/fipenimo.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/79488025958.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/7n1252b1tgpcp758060ob36l4e/22441285794.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/57003438290.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a506cc8df55---53005184035.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/49597286327.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba42a164ed9---sorotaviweroj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=free+html+themes+responsive+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ff5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00021771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21771 17100 bytes
SHA-256: 16b07df8d4e67f8dae8a431e028baddb602c95f3037d45bcc1c7c0fc4ec042d8
font_02_sfnt_off0002441c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2441C 10788 bytes
SHA-256: 1a740c6226a664c3d67703a922e0001168691537e8fa944f313788b6f82208f0