Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9f6a705d5052ac…

MALICIOUS

PDF

72.3 KB Created: 2021-09-18 12:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 50146d035aab4694a45d00da98f528fa SHA-1: 6c24f8eba93a8cfc7d38112dd8fce8e730795c5a SHA-256: 4f9f6a705d5052acfd0226af25e83162c7aea411de442b36ed925af7535a207f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is part of a link farm on disposable hosting, likely to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • 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://cpsguffanti.it/uploads/file/22095833820.pdf In PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a21fc26246---53816302126.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/56bb976600013d3bc8cad852f76ca6a0/508041926.pdfIn PDF document text
    • https://myclubowners.travelenvogue.com/userfiles/files/84152909952.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/1330139196.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/jukumobasuvuw.pdfIn PDF document text
    • https://lemarko.com/userfiles/file/vibakemeb.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/27480012863.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/4461881846.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/xizuxat.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/perowuzizezurasazin.pdfIn PDF document text
    • http://nineslash.com/user_file/file/43619168468.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/runokujabuwuv.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/lokaferenuloza.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/vufepumul.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/xifodotoxamupa.pdfIn PDF document text
    • http://marjoleintje.nl/include/userfiles/bamafizedezuxi.pdfIn PDF document text
    • https://korankertas.com/contents/files/71170354804.pdfIn PDF document text
    • http://ciba.lv/uploaded/file/41232399275.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/rolarolesogegerexefepenub.pdfIn PDF document text
    • http://tythb.com/uploadfile/files/80948273312.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/tiwunap.pdfIn PDF document text
    • http://studiozoppini.com/userfiles/files/nivob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=social+studies+textbook+for+jss1+pdfPDF 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_off0000b6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F8 11200 bytes
SHA-256: 490f48d7d1b6daa69f90e8730934860e72e4093f81ee44aa5a7679adfd8c9db6
font_01_sfnt_off0000d11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11C 16756 bytes
SHA-256: 384c0fd87bc7891e84069627d1924b7d3474bc597b49c727c6e896b7f06f55fd
font_02_sfnt_off0000fbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.