Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75eeff22d623abb…

MALICIOUS

PDF

69.8 KB Created: 2021-06-10 10:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0194df5c4672c2ba0291beb3ea3717a SHA-1: a003d099b247dc458419aae2635bde84d783deb5 SHA-256: f75eeff22d623abb61af9a379c08e1bbb3ead21266c3d808831271adfe72aac3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to distribute malware. The document's content, though heavily obfuscated, appears to be a lure for downloading a file, indicated by the "death note mp4 download" string. The presence of external URIs and the nature of the links strongly suggest the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7841

Heuristics 5

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=death+note+mp4+download
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/e34d3c131fc80b0e110bd6b73784790c/pavokiliputaderoxesi.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3955a93f9---52114121323.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609507e7bdd3f---67008024377.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/784dbf192ae49f5f07047466a7277d99/39431441919.pdf
    • http://billedbutikken.dk/articlefiles/file/99113547740.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/b72bc7caba9bcae4982d61c8523e2576/kunefisofofu.pdf
    • http://adamlegal.com/userfiles/file/68567775541.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/au7c2m3tsfl7gh6aomhip0j3o5/luxabuluninof.pdf
    • https://angel-juicer.com/FileData/ckfinder/files/20210607_1377774D81B90B9C.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a21465417bf---46216201917.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3fafc643d---37896737471.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a119fc563aa---75427150265.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2467bc0fd---rilebosedad.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160b28324b8538---18158230447.pdf
    • https://welltowork.org/wp-content/plugins/super-forms/uploads/php/files/1942fbe470956f66f018d295245f92d6/34466017028.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7f4.bin
0d92e529edce3d40673aa4d3c1a37b6f4ca40d16397055a4fbdf10ada284692a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F4 3540 bytes
font_01_sfnt_off0000e48d.bin
3371c555cb063b54b00bbb644329829f29bb7c06288686ae6b5fbdf4d2d549cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE48D 5104 bytes
font_02_sfnt_off0000f5e3.bin
4d081882dc6e31653faf500e3a8e5e1989ce41f990e479e418194f3dd65da023		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E3 11500 bytes

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