Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b109c6d9ca9489b…

MALICIOUS

PDF

86.5 KB Created: 2021-08-01 18:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e7f5dbaf47bbf1534705b104e5abf47d SHA-1: 449f56f7637f1bf49a073e8879566fec97e73343 SHA-256: 9b109c6d9ca9489b0c334f3c69626d0f364f8482e0c996946e6371718d3a5fb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting domains. These links likely lead to phishing pages or serve as a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://nomylo.ru/uplcv?utm_term=what+shape+has+9+edges+5+faces+and+6+vertices PDF link annotation
    • http://zhuoer.ltd/userfiles/file/68727021038.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/8b4f3008264e2908e534907c4991d10b/seravekuwodewanetedizo.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c7ca1eab9---15413744782.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/nubiguwifumitekazit.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/61839514632.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/6d3b9a5129b29a46fddea1159d7b0280/37111343485.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/6fbe89a9c686cfe902da47479125a495/tefuvometavawe.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/s53nej2u8ngd49lcmuft8sfupp/5090616051.pdfIn PDF document text
    • http://dzbnf.com/upload/file///lupeduwun.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/03ec59f5fb8187559a6a4b0a34b0d4a5/gawan.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/0411b3d16769344a296b79c4e3b8a2bc/97814596208.pdfIn PDF document text
    • http://poorclarescork.ie/images/47872256313.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ad57cb0c7ce---bibinalijuf.pdfIn PDF document text
    • http://igorodstore.ru/files/userfiles/files/67849323191.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/63e47cb979357e9d181e2e0f42108cd0/melukepilobasofagirakeju.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c248072e44d---42188155443.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/tegetaj.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160e49d565b24f---4782409609.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/32587387555.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/fodimevuwivaporagoreg.pdfIn PDF document text
    • https://yuss.it/file/56211490235.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/72188104641.pdfIn PDF document text
    • http://email-database.info/userfiles/file/kalofoxesuzipor.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/f9b2753c772529e59e0545045307b1d5/texudakireroduraguxum.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160f67d1616f1d---55400433897.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fdcbbb2b3---16852846483.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/81624446009.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/51165177460ecae0f65ac0c301866ec8/simezokariji.pdfIn PDF document text
    • 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_off0000ec99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC99 11264 bytes
SHA-256: c6ecda5ba9237db8108fede386fedea11a671271c76764d65cce7c88e3495760
font_01_sfnt_off000106d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE3 17128 bytes
SHA-256: 89700b4cdd83d5de90bc801b7f70715d5243134416ca3bfbe67197551c69fcbf