Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff42a94f5b890e40…

MALICIOUS

PDF

72.0 KB Created: 2021-08-06 16:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 3545acd00c44574058ef0358f8ba2565 SHA-1: 9502738fad7401b7c69e336e70d72a4e88cc984c SHA-256: ff42a94f5b890e40581c7632c053bfdb32140d3bba0f8f4214ef1a78c4d81640
154 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to lure users to malicious content. The presence of numerous unknown URLs supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9153

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 https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/c1u561u9obr1uc44200tsb6s4r/34211270853.pdf In PDF document text
    • https://konyaalotaksi.com/userfiles/file/pamumutilajunis.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/55865419634.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/bezaxovuxejulaleraletibod.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9cedd7a09---32564824175.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/92680007b0bc505973b98bed64bb9c41/64351584835.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/69827613473.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1efc2bef91---33870136179.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cdbae58d5---wovupagesuxepuwebul.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/9c9113b6a39985df998c224455bb3cb5/80324327745.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/bezaladogupuvop.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db783f531fb---75314553061.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/07/file/19944421553.pdfIn PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/pefotigigipojo.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/gixabezakenubisoroxo.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb2ef4f853---melojonimokiz.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/27201517455.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/0ksqghjuqaknnnshflb39m5ck0/pesejuserijesutuxe.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/8c71c58175492b2259566fc978718299/16767594345.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723dd168465---74824379031.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/fujaxagazoxiwavagar.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/pebcl8srkll5pkhvke2ibs7jel/wafapolunanunovajefenakan.pdfIn PDF document text
    • http://haverfordhigh77.com/clients/e/e7/e7c5a96ea35a64a1345a575153f12e7e/File/kazenisokatomuvolod.pdfIn PDF document text
    • https://ocw.tw/uploads/files/2840569776.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=the+betrayed+kiera+cass+pdfPDF 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_off00010ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA2 10756 bytes
SHA-256: a27e059c4769913733e4fa611afc6c67934a17c55488ac7b5bd12ff6d3c4f8a9

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