Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6394a56b7977bce…

MALICIOUS

PDF

70.3 KB Created: 2021-09-19 13:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 14e4fa5fbde43fed5e0552e305723306 SHA-1: fc69ab665c062f28397169378f85a34e016f7d02 SHA-256: b6394a56b7977bceabb6a94cdef6f0762cb4ea7e0b063b05e208c6d220473ed7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded URLs, many of which point to compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple external URI heuristics further supports the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8295

Heuristics 5

  • 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
  • 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://rund.cz/UserFiles/File/11450935653.pdf In PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/degigevabelub.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/98347815393.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/66213213051.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/xuvikivup.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/62539183660.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210912_B68297D9E33ACE24.pdfIn PDF document text
    • https://debo-fit.be/userfiles/file///52866887635.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145d843b11aa---72782228830.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/guvazijifajususonegiba.pdfIn PDF document text
    • http://checopharma.com/upload/files/21592587080.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/padujurutebaniderelama.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16145df6c78bab---jabogulavar.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161468f994d3e9---sabopabegetar.pdfIn PDF document text
    • http://lifecontinues.ru/images/files/61091192119.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/muzegisuxefoxisabag.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/maruz.pdfIn PDF document text
    • http://vinhthuanvietnam.com/upload/files/pelufeberi.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139334f4b514---pakatufasuvigedufu.pdfIn PDF document text
    • http://rurisnet.org/images/file/65871273993.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210915221952.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/12972521394.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/rifakejikojomadoxabifodow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=rick+and+morty+pilot+script+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DD 10900 bytes
SHA-256: c40c5b3b8cdaf29ada3f466033e712a064165c44ea2ab9031fa88d4b9b0b33a1

Open this report in the interactive analyzer, or submit your own file for analysis.