Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce366822ea947503…

MALICIOUS

PDF

78.8 KB Created: 2021-09-01 05:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 851bbe2b4ab226b54adf5e3c00b94fe0 SHA-1: e05e33e468ed053457769732e47e8756855a6a1f SHA-256: ce366822ea947503c8f400592be8cd17d1c10f9de85cfb3e382c8baa5b4439b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links pointing to domains that are either compromised or appear to be disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded links suggest the primary function is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://goez3.com/10005001208290177/ckfinder/userfiles/files/81850817114.pdf In PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612948f695aea---ruxojesuzujuronej.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081c18f1e29a---75273776404.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/mapuzulamamerob.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/48987036868.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/sovexabozolem.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/julaxinin.pdfIn PDF document text
    • http://sddshchb.com/userfiles/file/Fl202107260553154903.pdfIn PDF document text
    • http://malabarisproducoes.com/arquivos/files/28751759939.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/f95a0868bbfd3f9f81b4169aac76eebd/32968984362.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/66762616434.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160777f1c04aaa---62690379683.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/2e779f016a2d7172c8860130c2053074/47094984178.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/61643542272.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608773bcb974a---mijiwasefemuvepiza.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccee2bda47---39711311710.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/jopipefavufuxudav.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/lizugevepojidem.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/kegoxovurimasapedej.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c46b90aca2f---65269101709.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7ebe50c77---laponukovudop.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/labifogi.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/xapatugikerapotep.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/musokani.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=a+lannister+alwaysPDF 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_off0000cef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE708 10160 bytes
SHA-256: 6632003e99efc48e28245d46be0a43166832fc8f6ef681ffcb0c9862375b0da7
font_02_sfnt_off0000fdf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF7 18004 bytes
SHA-256: ba4f25c99ee36ff19017fb83a163bb7432965d2d2cc19c657098319d94166cea