Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c1449a734d1af2…

MALICIOUS

PDF

87.4 KB Created: 2021-07-08 01:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5280fa25e41befbbcaa35ed15c2a3f19 SHA-1: abfbfb206e82e7a74caa2d402f6bfd65b4cceb11 SHA-256: 54c1449a734d1af28f3cb54eb2f867c7252cc3db126342292971346ef5ee59fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous URLs pointing to compromised WordPress upload directories and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=wo+dheere+dheere+mp3+song+download PDF link annotation
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/1d1c02632aab2990475246ebaa558878/66618821144.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/cc5ve8p7o52685nf3fe1nu40u1/31380482917.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/cc7bf54b21d4f74c9d638e884a6c5b32/85298264025.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/d6fa93398668af3a6472642c234dc75b/86416652539.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16096c2367b8cc---biwegap.pdfIn PDF document text
    • http://sushibelovo.ru/files/89925318031.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/fizunodiduz.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/53665951660.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/wigivutopoderemuxeduri.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/700sb53626pau0icug48oe0p83/napawanovidepisi.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb295d3d65---fapogimofe.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c9f7f8c40b4dd5fb4b635d556e192b13/zumudiveturudejazolukiv.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/wajilekajofujedab.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/85004809488.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/61e13babcf624aa12ce47910c2cd3949/13752917449.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/forebidopajuvidixuxo.pdfIn PDF document text
    • http://thecobbfr.com/clients/4/43/4363d5a08aa72aedcf7f7d4dd0675897/File/36070208867.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/8bf79426d0knmjmqao1gasngqr/26139339133.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/dutedirizawijasuzerov.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d9f0e2630---19331402737.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/289c979517c8b76472997b9565f6a34a/10390082612.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/50c7b4cf5a2a6f578ca7d51cadb45473/wenuvenamiv.pdfIn PDF document text
    • http://susanjeske.com/clients/82887/File/38931722326.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/kjg9feptv27jo9e6qgg8ki0jf7/88173543798.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_off0000f26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26D 17096 bytes
SHA-256: 16defe116230d4b320283d0349af67e3e9d8041303b45c50d0d74fd777c18074
font_01_sfnt_off00011f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13758 10900 bytes
SHA-256: 486359037fe3f136fef552fd4bd5059c04c912fb306c838838efdfae8f636c53

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