Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4510d9e0dcee2d1…

MALICIOUS

PDF

87.7 KB Created: 2021-09-21 21:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c3129fa7b9a17134047fdce9d3254b4a SHA-1: 15ed17a2185c7035a0fb525aff64a0dfa322344a SHA-256: f4510d9e0dcee2d1dff018b7192e30d8d6e23760d61717668dc8ca3b8d5db991
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF, likely used for phishing or SEO manipulation. The presence of embedded JavaScript points to its use in executing malicious code or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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://maisonfamillesrimouski.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/9030602746.pdf In PDF document text
    • https://armagedonspedycja.pl/files/file/77350933551.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/mixoronukozexup.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/salap.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/zobipogezug.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/momofalovusenab.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/zovajuditejo.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/dowukepovukasebofivegipe.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/roduzoguwodolowanodunura.pdfIn PDF document text
    • http://ibsdhc.hpds.work/ecdemo/web/js/ckfinder/files/files/vevorujuzetalofowanatex.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/40675053076.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/70718891870.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/89236993006.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/metogamosonena.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/bezuwujebuzifekupapamof.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/nakiwipanerifabika.pdfIn PDF document text
    • https://hockeymro.ca/docs/file/rakixemosax.pdfIn PDF document text
    • http://snbedu.com/uploadfile/file///2021091923021170.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/pajowivejagegalagisesaxa.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305afbc2e6d---71215684920.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/29523026118.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+know+someone+checked+my+instagramPDF 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_off0000f018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF018 18380 bytes
SHA-256: 7d683ec7292964ba7d11ea1518ce88142952cc98413cbf496718070e8674ddd8
font_01_sfnt_off00011f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7F 11052 bytes
SHA-256: 4018ce5da1bb339a1568a5a541023cd15e9afb113be85b725b78f36bdec39016
font_02_sfnt_off000138e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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