Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ff30b6d9352f28…

MALICIOUS

PDF

86.9 KB Created: 2021-09-23 23:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0738f26461281215bbc6efd07ed34e9a SHA-1: 452ec3b1b041a622e40e831a65ed4642ad2dc730 SHA-256: 60ff30b6d9352f2815f4f749aff96731804004e8b87219120c646e1d10b99801
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains numerous external URIs pointing to disposable hosting, indicating a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of external links and the phishing/trojan detection suggest the PDF is intended to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://crysiq.ru/uplcv?utm_term=ludo+king+temple+run+android PDF link annotation
    • https://ln80.cn/filespath/files/20210909093757.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/36519037525.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/72812872654.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/masusovufosopizig.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/mokevazomogotofojorefed.pdfIn PDF document text
    • http://studiotecnicoligioni.com/userfiles/files/26859861121.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/ligojegeveru.pdfIn PDF document text
    • http://joeun-it.com/userData/board/file/jujosotomoneke.pdfIn PDF document text
    • https://parlagame.net/calisma2/files/uploads/vovesim.pdfIn PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/zitedevigukirugu.pdfIn PDF document text
    • http://allycatering.com/userfiles/57861649210.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/28370089602.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/55090280840.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/pidemabipusiwedariduruk.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132e42588a01---garadaxobekapitoligaso.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/sanijanidebemisaki.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec4c1734e5---zegiletewabonevebafigime.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131bad9e4d00---tanuxabefi.pdfIn PDF document text
    • http://begues.mobi/userfiles/file/zomudalupofikodil.pdfIn PDF document text
    • https://somogyplusz.hu/files/luganaxawizataberaka.pdfIn PDF document text
    • http://powercleanperu.com/cms_powerclean_2015/sgi_userfiles/userfiles/files/fuvajukojadupo.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_off0000eb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB43 19096 bytes
SHA-256: 37e01e4137a586af24c1cb33c6527ad4f640be01e57fa5e2ad3165a75b8c32d5
font_01_sfnt_off00011cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134CA 10716 bytes
SHA-256: 67277e85e24406cb8c16e981d494bcc1e13203a485058e9bf61616f34b09ad6f

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