Malicious PDF — malware analysis report

Static analysis result for SHA-256 76eff65452d6fcbd…

MALICIOUS

PDF

79.7 KB Created: 2021-08-01 04:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96cf583c2950d2ae4695f5985d49d43f SHA-1: 8cf9f23bf9d48d09cca826727edf269559fbc1c0 SHA-256: 76eff65452d6fcbd3e6fda3f4fe5293e427433d64737868600c7c509d2fd686f
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress upload directories. These links likely serve to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6920

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://medvor.ru/uplcv?utm_term=what+is+the+theme+of+the+story+androcles+and+the+lion
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16074259a99e81---napurazozezovejotewivawin.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16103635db6b64---nonubadetufekabaz.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c358730fc8c---rolopuv.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffef15e3d7---1880145398.pdf
    • https://muratay.nl/userfiles/file/54509921179.pdf
    • https://wickedcheesy.com/images/file/69414257424.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/737274170bd177288eb611ad68028037/30665890685.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/52fd0e1feb7a550911bff364dbc11e6e/kipapurubujujuvolavesox.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1609bca88694a7---gadixesagupunolewirur.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/28101963376.pdf
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/92394930009.pdf
    • http://www.sictombbi.fr/ckfinder/userfiles/files/zarupogob.pdf
    • https://footballsod.com/images/ck-uploads/files/24786235360.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608531d49c845---72433669894.pdf
    • http://mgocsm.in/userfiles/file/jikexorivepegusimap.pdf
    • https://amd-export.com/site/upload/file/virijefip.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/js3ipva4cc6t4crogitc4k9rf1/wawepuvedowubegexaj.pdf
    • http://divorce-difficile.fr/userfiles/file/62821231075.pdf
    • http://chinalabware.ru/d/files/regonof.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941d542e9ce---paxikibojotosiwatabapiju.pdf
    • http://boek.se/bilder_umeny/File/lifivunezowatipeguv.pdf
    • http://aep-tc.com/cache/fck_files/file/74158573867.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012158.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12158 16792 bytes

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