Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceeb47e86d48891a…

MALICIOUS

PDF

83.9 KB Created: 2021-07-30 18:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 4a5ce31833e823d25c3352eca680c2af SHA-1: 31c5df1bdd96f9a46b4a6a66e811ded0239f9671 SHA-256: ceeb47e86d48891ae1da18ed260d60896686722954f9b1ab5d13e5174812cdff
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document employs a 'password-protected archive lure' heuristic, suggesting it aims to trick users into believing they need a password to access an archive, which is often a method to bypass security scanning. Numerous external URLs are present, many pointing to compromised WordPress sites, likely serving as download locations for secondary payloads. The presence of embedded URLs and the overall structure suggest an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crewmak.ru/uplcv?utm_term=how+to+manual+reset+epson+l3110 PDF link annotation
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6279d861e---suramutupezekobolewuv.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa08f5d2cb---12023561525.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/ojr7nuh5vm8u53l7kmso19neh4/2542709795.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/b26f54d739be17dd4b1b371ba20cd152/11183679472.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de4aa838341---rabidinibosigemipube.pdfIn PDF document text
    • http://sy-smile.com/upload/files/65138831721.pdfIn PDF document text
    • https://drlanda.hu/user/file/85691666295.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/48786867328.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a3689981796---67174342825.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf8c0745d68---xatapunelu.pdfIn PDF document text
    • https://tipresentoio.it/images/file/wotupumetuzepunopidowako.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9895f13c3---295598512.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/jabotubufedexetojegi.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608487a21e899---tisegululaz.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d407d0ed7d9---xexipolifitukumutopil.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160dc2c6b6c073---77054961897.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/rimovetoxo.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cf2911778---jukuverijepaluz.pdfIn PDF document text
    • http://rokakisreunion.com/clients/a/a8/a85ca1e4cfc2bb88d767af442173b437/File/peditonezozivokibeb.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/40675636330.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_off0000e335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE335 17608 bytes
SHA-256: f29ece087360c0850e4c35285b16892cddbebe12ce82685f7b0c881ac431a720
font_01_sfnt_off00011171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11171 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12988 10844 bytes
SHA-256: 1e8e39653ab883bca18ead1890adf6076d32656a53a9decf9db1d8acf4cfc6ec

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