Malicious PDF — malware analysis report

Static analysis result for SHA-256 410261b15f59a330…

MALICIOUS

PDF

84.8 KB Created: 2021-07-03 01:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a794ccd2ae74c007aa4f7efbfb7997b0 SHA-1: fab3187013b93c8001d740fa38a522e9ebcf8fce SHA-256: 410261b15f59a3307f405126e1da6f667b34ee69896771212c5245d4f82fe2cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9834

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 http://mckeoughfamilyreunion2021.com/clients/b/ba/baf9e6b347377fae0abe5a87436fc4cf/File/41499347860.pdf In PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/3a65f32e7794d43553ccffc3d6e8a47b/26625027260.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/7f7cf0b4f5486c820d52b9d05bf2a1bc/zatekurujusabasipurexinil.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/71816785161.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/0ef5c6b8ff4dc95b0ce974fc9650e114/74206443205.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/kosukukiduf.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/88772528623.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/dizapitatovaraxeb.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/sategefovadaxuli.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/30747378284.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/c5a1f2510d40328a42fbb7ef94e5e641/12832419859.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/92797986573.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c953bebc2---rozudi.pdfIn PDF document text
    • http://usmleworkout.com/files/file/fugavuporepudodaxekujuvab.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/fiworudizaxevi.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/9205292786.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/b4c9cf9f2baccb9e32f3f5901f829c73/95679549941.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/97654800244.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/ec7cd7240146f6bdcbd8dc63ff4183a9/84570742113.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae5c6cf3d2---95210889581.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/ruluwofipegavip.pdfIn PDF document text
    • https://hoalavender.net/upload/files/68690106232.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/m0sg4p33n07bcjfr2hqlcji511/95427389988.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9cf8c1f106---86776605817.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d561ded8524---48135469078.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16078f0d2bd415---27803823437.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3cd93797b6---bavuguxutug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=treatment+for+disorientationPDF 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_off0000e9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C2 10432 bytes
SHA-256: d905bc92321b4c4048df345d0ba5d27423b9072ef0a2eae28499e74c02b32bd4
font_01_sfnt_off00010161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10161 16584 bytes
SHA-256: 7389462aec7331eced52741cca2866158b82fbd550de1b624c76e44c6acce0b1
font_02_sfnt_off00012c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1