Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e0f25a96ed831c…

MALICIOUS

PDF

94.5 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: 0500fdffee9b58eae0d83412ce4c2319 SHA-1: f6e3cfd95583e6b2216007590645e0a4f03484d8 SHA-256: 46e0f25a96ed831ced39c35d332c9fec3eb5e29c9503f60598368a38da02e04f
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS upload directories, indicating an attempt to obscure the final malicious destination. Heuristics suggest this is a link farm on disposable hosting, and ClamAV detected it as Pdf.Phishing.Trojan. The ML classifier also flagged it with high confidence. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off00010ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA2 10756 bytes
SHA-256: a27e059c4769913733e4fa611afc6c67934a17c55488ac7b5bd12ff6d3c4f8a9
font_01_sfnt_off00012557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12557 17892 bytes
SHA-256: 389c00c4624170faf18dfb722dcb2ddf4b59df6d71889829f198ba3e30ed4b69
font_02_sfnt_off00015409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15409 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1