Malicious PDF — malware analysis report

Static analysis result for SHA-256 5675363859efe4ba…

MALICIOUS

PDF

84.7 KB Created: 2021-06-28 00:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d1198d52d7a0f76a71085d146d173c91 SHA-1: e26da17668a159200d70c905398181e5b7f0e1ee SHA-256: 5675363859efe4baec88ca69ad2b7fc56dcb33531d02a66517e681c82aadc696
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of multiple PDF link farm heuristics indicates a deliberate effort to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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.
  • 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://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6b76f292f---gixuvavobewalev.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/3842069481b16346c7f19e95f51a353d/23464670995.pdf
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/xovevenu.pdf
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16245826423152.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/1253d2d4f3c66da9360a59104aad9962/bisotijopu.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/901a52f50943126fef8e0d3501719394/tawolan.pdf
    • http://lederstuhlshop.de/ckfinder/userfiles/files/minunolojelejox.pdf
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/metofenapogekogibusa.pdf
    • http://mientrungpetrohotel.com/users/files/48163745707.pdf
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/f4o4g203b2dgdrns7jjqhj30r5/38497246553.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607766f552fa5---9055776056.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160b8c54e9e176---viwufekida.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a0c279aa6---41470425971.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a9659ee48cc---taxawivirojozazuzawul.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/k8dp8frj9hqv4gj2oe7e5e0s76/tedonanufuletanesanekav.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/75124280053.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073783035295.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16091920ed98f2---73748315583.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16095c45ce7376---bikemafobomavosopulo.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2fcfabf602---mopex.pdf
    • http://messtores.ca/fck_user_files/file/36441467432.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=multiple+psychological+disorders
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8c1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C1 16792 bytes
font_01_sfnt_off000100d8.bin
21a80344372133b93536e4c80431de4422794696c450cca289d2beed66a990ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x100D8 10896 bytes
font_02_sfnt_off00011a08.bin
3a775c9b7c67f049d21e5775cabb2b1d2b0be1fe4c8ccbeee819189781a68778
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A08 16756 bytes