Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c3cbb6832633a0…

MALICIOUS

PDF

80.7 KB Created: 2021-08-26 09:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: accb801c087954f8ddbe2daaa697e350 SHA-1: 9e1e3a4772d30ed70a5dedff96658a5805dfa894 SHA-256: b0c3cbb6832633a0e6af9514c0dad7c57ca99378e0b654a2c8dbbeb162a9c9b9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on distinct, low-reputation hosts, suggesting an attempt to manipulate search engine results or distribute malicious content. The embedded JavaScript likely facilitates the redirection to these malicious sites, contributing to a phishing or malware distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=exploring+the+public+cryptocurrency+datasets+available+in+bigquery PDF link annotation
    • https://mastirz.com/userfiles/files/47661637088.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/13260477301.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1611aa297eb18b---52722050648.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/22622509552.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d285c7946db---40107490273.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/75795111838.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/4tji2fvcq022ceo9tjdldo1kij/sefutulafenit.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/vividizatuwarufodas.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/dekimemefiturokezibeg.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18a502736f---8381121730.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f055299d24---fopopiloxovobelanes.pdfIn PDF document text
    • http://fs-select.com/images/blog//file/25416167680.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ff49792be---zujobikafugejepu.pdfIn PDF document text
    • https://orrizon.ru/images/file/37078809665.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/71752208748.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/73150439887.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/wazuxemobu.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b4511f2d2f8---kevasodevokegoledovopiji.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608069d808d69---tetivo.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f90ecdb9150---79712094362.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/jenijobitatosi.pdfIn PDF document text
    • http://suurelepa.ee/data/file/22616716515.pdfIn PDF document text
    • http://www.hkimm.hk/_bin/ckfinder/userfiles/files/toxewupavemade.pdfIn PDF document text
    • http://www.forteks.com.br/admin/ckeditor/ckfinder/userfiles/Images/veminufaguvikul.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608760f8cd34e---37997741500.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/70703702973.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_off0000d55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED70 17120 bytes
SHA-256: 81115027a60b7878e7bebe631211ceff2361191405e1588d27942995dde1d9f6
font_02_sfnt_off000119f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F6 11444 bytes
SHA-256: bb709c429c9b730cce4e8e4fbe6eb12d5218e3eda6675dfa4f31513fac26b930

Open this report in the interactive analyzer, or submit your own file for analysis.