Malicious PDF — malware analysis report

Static analysis result for SHA-256 602a8b678058bb14…

MALICIOUS

PDF

73.8 KB Created: 2021-09-27 03:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8224cb6fcba18a80000c18e7c0500517 SHA-1: f4358cb940ae70df6ffeae80d46760a58fcbc95e SHA-256: 602a8b678058bb14e4e9eb5d365697f34d502399d0e5ea21e8c3b2ebb2046cc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards an attempt to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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://archism.ru/uplcv?utm_term=live+sport+stream+websites PDF link annotation
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/25669607891.pdfIn PDF document text
    • https://infosantiere.ro/userfiles/file/nikikufetovamum.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/44476684743.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/5r3b0hfn32eo26se0kc9aqqr93/xuniram.pdfIn PDF document text
    • http://thesei.com/In PDF document text
    • http://giovanniseneca.eu/userfiles/files/21048281252.pdfIn PDF document text
    • https://alutat.com/data/file/nemubolaleka.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/tuxewa.pdfIn PDF document text
    • http://checopharma.com/upload/files/kagutikebinoguvorepisewi.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16138168d26c85---24611370341.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161365b9d3d2c3---34915733540.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/12763973465.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/vakuratidi.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/60627839445.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/musatebunulodomag.pdfIn PDF document text
    • http://aquatherm-graz.at/files/ximonolo.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/mamuboditotosinogamimuri.pdfIn PDF document text
    • https://roarmysecurity.ro/mm/file/33064704421.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/415da1abc2f44b01faf1018083b1b212/13334756844.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/75736148155.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/b9a1cde103fd6026bbb4d6200b9c376f/88869965883.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/xixunovegelugolabimuxi.pdfIn PDF document text
    • http://studiotecnicodambra.eu/userfiles/files/gukobawepujaluw.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/pagokiz.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/47753929327.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_off0000b9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9CA 10512 bytes
SHA-256: a311a8e78d296b60f9afe0a8b0c393cea266c63319753c99d5433f50da2cb0fe
font_01_sfnt_off0000d1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B5 18592 bytes
SHA-256: fe1ed6ac1afbdf21d3ecf6cfd1db711ad784eabd67b281b5e067f69344f36560