Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b849aa12cd87fc…

MALICIOUS

PDF

129.0 KB Created: 2021-07-16 20:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 93c28b1b5810232655df2a9184273b22 SHA-1: 5da901e9f279a9bef70f8c2cf062d0cbac299031 SHA-256: 20b849aa12cd87fc98867a8b729fc977ebcaec80aa67e6fc70522a331f3c628b
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous compromised websites and potentially malicious PDF files, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. ClamAV also detected this as 'Pdf.Phishing.Trojan'. The primary purpose appears to be directing users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3623

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://files.ibiza-ferien.de/file/dovuzosixobilaw.pdf In PDF document text
    • http://megat.pl/uploaded/fck_files/file/5607645241.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf91694c8e---96686848234.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16086d9bbeb0b4---78649324694.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/josobulut.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/1189292662.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/e3377e103f0d0dcf72a5639b9556b5eb/21415334245.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/61157755064.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/67121091064.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/21760049489.pdfIn PDF document text
    • http://myphamasia.net/upload/files/nerapixubibimafotiwidepa.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099cef9a0424---xatuzedowupetapolipit.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/13729156596.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/239fef1b17d805c9f30782f0c757920e/89468603598.pdfIn PDF document text
    • http://deauville.ru/files/file/golafavuvuburan.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/fosudawari.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831525383e3---99005145594.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160af628195843---57314265716.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/zofelajodenapiturofo.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/64b48e48df764da2ebc3b208a20b120d/62381165210.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fbd4dd086---pezupodaxotamuketogo.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/9327597212.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/vegukabasulakikozosimijo.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/vunitodevonigoduv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=hoi4+instant+training+commandPDF link annotation
    • 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_off0001a85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A85B 10604 bytes
SHA-256: 20e0bf2f6de54f0c8e9ff5e7f4cf27d72ed383decdc081bac5d59d910ac50f9b
font_01_sfnt_off0001c067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C067 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001d879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D879 18528 bytes
SHA-256: ae1a37bdf9e18ce9f69e7628e71e34652b8adbfd45225cba376501d995b5b9a6