Malicious PDF — malware analysis report

Static analysis result for SHA-256 030b60d2c506c18e…

MALICIOUS

PDF

85.6 KB Created: 2021-09-08 03:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fea85d7aebde41e20d3d8461d7d69e13 SHA-1: 3f4bad8fd427dc5d2915c8e2c9644a23d1e92cc2 SHA-256: 030b60d2c506c18e2c2bb5a41f510e09081caa2dc3fb8d556a65bfd09ce85615
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, a common tactic for distributing malicious payloads. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions to decrypt a password-protected archive, a method used to evade gateway scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160ace1c9aa0c8---81165991742.pdf In PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/7dd4v1clth8nlldqrurmptudc4/kenenajegili.pdfIn PDF document text
    • http://csp.hu/editor_up/gonopavagutorasonawifete.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc8b647bb8---takevapolut.pdfIn PDF document text
    • https://sealskinz.ru/files/file/35770478263.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/xesuzuroxawofuxegig.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/wasetadoxuvinivutuvepusoj.pdfIn PDF document text
    • https://hssanesteban.cl/files/52134927800.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160927fb35d273---73294521724.pdfIn PDF document text
    • http://brenderup.ro/mm/file/53273834790.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/a52f0a4704bb1ba62ae030cd6c4afbeb/64606748135.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/faxoziredojivuvukewuninu.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/sio8vfnotq0uf3f5jp7c6ecv13/zuwowipeved.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/45405058774.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/rbq8b8pe0qg6crdbuqinls8ob5/mevurixadorubav.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3e6e6bf4f---51545879160.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zakatiperivebivufodigaxu.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/98434733510.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/33857455879.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/47949609410.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/26em7bmf9hhtosp3p6ggktvai1/18610141563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=come+comprimere+un+file+pdf+sul+macPDF 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_off0000e918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE918 17740 bytes
SHA-256: df24a1cc70cda217c28e7f9fe60417834679f32b635806f9d92864e3c7d3eb81
font_01_sfnt_off000117b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC8 10812 bytes
SHA-256: 57d83fa894688495d0e596886b63582f8b3b9e68d99042289707bb8024397afb

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