Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5956b00b05bea79…

MALICIOUS

PDF

82.8 KB Created: 2021-09-09 04:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f901b98fe9020c8dbaaf39421202d91e SHA-1: 868ed8eec4403694fbd2661530bf1b11881e613d SHA-256: e5956b00b05bea7914b6ee58de5961707765c1b9460cc6bbe4ecf4e3a21253af
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://le-lemniscus-incandescent.fr/ckeditor/upload/files/49464656806.pdf In PDF document text
    • http://trustarshida.co/cache/fck_files/file/13589126937.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210909_C0F45D4B63B9A027.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/80140749812.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/tupugotexu.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/88282769885.pdfIn PDF document text
    • http://megatex.ua/images/uploads/file/4392305879.pdfIn PDF document text
    • http://explosivedevices.ru/media/file/raxitafanufa.pdfIn PDF document text
    • http://igs.compcierge-asia.com/ckfinder/userfiles/files/lutuwudeb.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c2b0376f4---95579784988.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/wonumezefos.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/gepizejasole.pdfIn PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/43864732463.pdfIn PDF document text
    • https://baobiachau.com/luutru/files/49631533601.pdfIn PDF document text
    • https://mannoorpally.com/uploads/file/68699306035.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/32353548683.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/80528704543.pdfIn PDF document text
    • http://harrodsrentacar.com/public_html/userfiles/file/10642114791.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/womusobunavo.pdfIn PDF document text
    • http://squash-fitness.cz/userfiles/file/gufajopirulajelod.pdfIn PDF document text
    • http://antropolog.ru/userfiles/file/1964138622.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210901004822947889nbaow2.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/89847086655.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/13833921093.pdfIn PDF document text
    • http://dangkydoanhnghiep.org/hinhanh_fckeditor/file/42446019980.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=transfer+files+from+phone+with+broken+screenPDF 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_off0000dd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD59 11028 bytes
SHA-256: 6385766654c19b54f3a00aa0e188036a658b27daf5a50703c12b31bb8be9d78d
font_01_sfnt_off0000f6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 17704 bytes
SHA-256: edfc32b04644d83820fee4fa2901037af4ca90e0488f567467ae845154a61831
font_02_sfnt_off000124b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1