Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ded9ebad94450fc…

MALICIOUS

PDF

76.6 KB Created: 2021-07-06 01:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 561858f20b86f8634f08eddadb181656 SHA-1: f34ecf302056bca029eb62e03aa12b5cefb1b2d8 SHA-256: 3ded9ebad94450fcde66894c29bfd11315d53106cb3ecd89523372f45e4b395c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://oniceh.ru/uplcv?utm_term=global+business+policy+council
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c6b6c7a17---7647130474.pdf
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/12611414753.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b355d6f7d---tuwusoketuxuvuruxixomixa.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094147ac6a69---fasegu.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e12f5a8eda1---84613342670.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160871fd65d1da---wujoninezajugazetesirimuw.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/ea08e72def4522bd45633281f5a79446/bamatiporopozasamilesa.pdf
    • https://soechi.com/userfiles/file/newufajumup.pdf
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/rexulilosevifijat.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/9cfabf3f67d461c1875e89f27fc08241/86345767043.pdf
    • http://midel.me/userfiles/file/kumup.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/460ed1669551d3c5564d3a5296434758/22961290071.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160758fe35445b---26890935521.pdf
    • https://psychologgia.pl/Upload/file/62003892000.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/02654ea52a80ba12ab8e55c5133b583c/39188657559.pdf
    • http://okulsanmalatya.com/imgup/file/nuraxiwodasazaluvulufot.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfd342d83---girerudelubevibo.pdf
    • http://championsview.net/userimages/ninepuresiridifafewoxal.pdf
    • http://asbufestival.com/uploads/FCK_files/file/ketize.pdf
    • http://accomplishtheimpossible.com/userfiles_ati/file/tadanediradadagojutagut.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/5bbfeaa0c3fe9596241e73beddfc91ac/foxopobalepilowegev.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160821b506a789---88406535504.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b72b5a087e5---mozomuruxob.pdf
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5e8926116---11668186314.pdf
    • http://akkoryazilim.com/userfiles/file/tizun.pdf
    • 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_off0000ca42.bin
3ebecd48c6447f893a8f8c9efd9571dfa5092b228a982c62433b4651d4c121a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA42 10560 bytes
font_01_sfnt_off0000e23c.bin
a99acd5cd509f67062155ff38fcb977e7cdaf399756b71517eb9de55c9665565
pdf-font-stream PDF embedded font (sfnt) at offset 0xE23C 16436 bytes
font_02_sfnt_off00010d14.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D14 16792 bytes