Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eef20ae1341bc5f…

MALICIOUS

PDF

70.3 KB Created: 2021-07-04 17:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e397eddb77a2448317ba2d92f8d09f8d SHA-1: 6c7e8fea0e18b4782254493e38c8d3a3b87c0a4c SHA-256: 0eef20ae1341bc5fc66d261d031d36eb25d7f0b7c6ad9e471acd5aefce8589b9
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload storage or disposable hosting, indicating a link farm for malicious redirection. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8833

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://butchercurnow.com/img/shop//contents/40177227873.pdf In PDF document text
    • https://burstallconrad.com/editor_files/file/firakumagotovotojuz.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/31122404175.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c65d0a5a332---pefawidusuxefi.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c64de5e19f1---bijobatopobalilasusizuf.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/01pgi54hkrfpfi35q1chdeah7g/66276276997.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/b6784f5c5df82ac687f6cb15b1f78dc0/wewedoduzososugimopekunil.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/b9da18b23fb230aa1ed9c2fa1d657013/tixanegisaxitow.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/69851395810.pdfIn PDF document text
    • http://gabortech.comadmin/file/3285404799.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/29597705584.pdfIn PDF document text
    • http://ckpak.com/fckeditor/userfiles/file/resimepizeg.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/79691759017.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608251d345099---22896538748.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/63607085310.pdfIn PDF document text
    • http://atek-ent.com/upload/file/napibe.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/bopalajitawexumexelekex.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/03ce62d2ea8ccc521ae3b1ed0b5c823f/gisemetes.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/h9h5rlpfjvnq4a2ovkdvlp9fvi/6590192962.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a32a5a6797---23416464375.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/setenelilufufu.pdfIn PDF document text
    • https://actor-conseil.com/files/file/38662046305.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/0a2b5936df78f78ebce5acc37f4c7527/xugupiban.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+do+you+trade+in+warframePDF 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_off0000f943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF943 10592 bytes
SHA-256: 494202596bf39f01e9a0976e2d5cddf04c0f250258ed141e2782c39aa8d4cba0
font_01_sfnt_off00011164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11164 1636 bytes
SHA-256: e3a1ca7fbcde87b6e2bc585668cff1a50452d2a09c95c546c16e9f90aebd6500

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