Malicious PDF — malware analysis report

Static analysis result for SHA-256 47deda09b903c67a…

MALICIOUS

PDF

94.5 KB Created: 2021-09-09 14:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e4f68aaff4beb789a7150a2954c64df9 SHA-1: 274b753735d6db50099beb88ae7313cb1ff6a29a SHA-256: 47deda09b903c67a7de168b677475ec22da03817c321f5a5c74b30c8509ce9ba
142 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, many of which are part of a link farm designed to obscure the true destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to trick the user into downloading a secondary payload. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • 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://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/xeseji.pdf In PDF document text
    • http://beastyenergy.com/userfiles/file/16801626925.pdfIn PDF document text
    • https://hirurgija.me/files/fuvikowati.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/dinifazibo.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/8373010299.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161334f8970244---kimogopajexibovo.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/62781153917.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/webasugisogufur.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/85282394727.pdfIn PDF document text
    • http://shoreluxurylimos.com/userfiles/files/46348351413.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/batovini.pdfIn PDF document text
    • http://webcertain.asia/contentupload/fckeditorUploads/organization_/file/nobixinorelemefusi.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/93990431839.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/dumatorozojabage.pdfIn PDF document text
    • http://guowangcable.com/d/files/32377411514.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/luzufakovu.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/sanaxa.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b017488082b6aa84e6bd4a1b9d74587c/57525364643.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/disimelo.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/doboramoruzi.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/kipaxezijubetudasujuraj.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/20219461415497.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/54409251105.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/ranuroroligopumililubo.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/natuzolutujizokitiri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=a+quiet+place+2+mp4+free+downloadPDF 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_off0001065a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065A 19864 bytes
SHA-256: b1f3bccbe99806b2a0ab94ca802c473b418e582a7f9faab9d5ae273428db3bc5
font_01_sfnt_off00013a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A57 11124 bytes
SHA-256: 717813a286a612b7fe45a704ca5718ec561328ad98cd74549319210594bea8e3
font_02_sfnt_off00015436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15436 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1