Malicious PDF — malware analysis report

Static analysis result for SHA-256 3294d801e3104a7d…

MALICIOUS

PDF

75.2 KB Created: 2021-09-14 13:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d6c6c61f5d63653f21a967862474ea1b SHA-1: c69640cda40f60897140c155a08b16ac0cf261be SHA-256: 3294d801e3104a7da19bba03ab833a8590b3a7c76a455e6efdb86fe8a9b68ff5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous links to disposable hosting, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading a secondary payload. While no scripts were directly extracted, the PDF structure and URL patterns suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://coytex.net/ckfinder/userfiles/files/vogozeloma.pdf In PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131d6fa58f64---bakumagar.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/40676939355.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/zazivudiranus.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/3635452911.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/buwigavudu.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/pavemu.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/62489861371.pdfIn PDF document text
    • https://helices-evra.com/userfiles/file/venezilewezorodon.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/bojugojafabi.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210901212746_209483542.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/66117936935.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/27127381352.pdfIn PDF document text
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/3796931897.pdfIn PDF document text
    • https://uat-tunisia.com/userfiles/file/83582085145.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d37945031d---wivinogiwijemokaled.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/51639315238.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/ruritimawafebi.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/mifezavejarolatazenukes.pdfIn PDF document text
    • http://jszl-rolls.com/filespath/files/20210912000302.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/zanudipawagokenigasava.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/98479677930.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/vixunetetekupugu.pdfIn PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/sotipafe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=sanda+kumari+mage+manaliPDF 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_off0000bd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD31 19260 bytes
SHA-256: 4606555b6a8c5c282edb8581ca4217425fabb620e001d88bd97a97460169fced
font_01_sfnt_off0000ef78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001078f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078F 10472 bytes
SHA-256: b05209757bff445be76dc7cfa0b452b5cdc3204619c83bbc47ee726e5c2d323f