Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a59972dcb2917fe…

MALICIOUS

PDF

85.6 KB Created: 2021-09-18 22:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 09918fe105114b74f5595cae4bb4ad0f SHA-1: 5def1dbd40eada2cc2bc6afc91bb5a78dd433a52 SHA-256: 0a59972dcb2917fe3d80b01f93a515360d2f180ce0f0768b545089327eb784cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm designed to redirect users, likely to phishing sites or to download further malware. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=beyond+dnd+character+creator PDF link annotation
    • http://vigen12.com/userfiles/file/netarivemi.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/jesogojejutagoxafe.pdfIn PDF document text
    • https://daks-96.com/f/uploads/files/59415844764.pdfIn PDF document text
    • https://advantage.ee/media/contents/file/pamemifofixiduz.pdfIn PDF document text
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/vadopigusupadamowokararin.pdfIn PDF document text
    • http://proficlim.ru/public/userfiles/file/41206519913.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/41091829690.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/16506869084.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/jududex.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/18640264805.pdfIn PDF document text
    • http://hueide.com/upload/files/tugazuxumixoran.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/e3c97e56d293405beb6f8c56f7ce5bdb/nosogafuzukexusumelulux.pdfIn PDF document text
    • http://tupnate.com/ckfinder/userfiles/files/bufaresiw.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/xajedadazov.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/rapevezetevosemunel.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/5930620725.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/fidoxovikijusan.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/xubuwelovusa.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613747cedc06d---9083823243.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/jajaxutamulitikenaduluki.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/84551301405.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/cp155cj8se7p6h85ecpog1g2og/57515152784.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131e2ffcf27a---85024156883.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/niduvokomokonikuwozevuzu.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_off0000e8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A0 10328 bytes
SHA-256: 91007c0d121bab10f0f44a3eb94df80f523bd65066cc1716c1d9f56adcc25f80
font_01_sfnt_off0000ffe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FA 18668 bytes
SHA-256: bc6baf3b866d75d8677db4f2b51858bc8e425e7d720a027f2ca3770be3f2bdc4