Malicious PDF — malware analysis report

Static analysis result for SHA-256 b66f70a784e4b890…

MALICIOUS

PDF

63.7 KB Created: 2021-09-20 21:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b7b66d4210428ebd21a9bb71f23f0ec0 SHA-1: 010bdb6664cdc580252bfc1b26e24462e9ee2b4f SHA-256: b66f70a784e4b8909f23cfb6caeca46450859eef20e6ccd410fd376244b9f4c1
124 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, suggesting it's part of a link farm designed to lure users to malicious sites. The presence of 'utm_term_redirector=True' further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5661

Heuristics 4

  • 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.
  • 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://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/lomax.pdf In PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/q5uecpd63f2mbfhll7obv4avt4/tozasarov.pdfIn PDF document text
    • http://decorstore.eu/upload/file/xafozebegib.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/gepekezuraluwijumod.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/bedonalolujuj.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/zosedik.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/57056222395.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/88656699317.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161477d93adc3e---15247776263.pdfIn PDF document text
    • http://miyagi.chi-kara.net/Upload/files/97394887333.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/35136426124.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/71754581219.pdfIn PDF document text
    • http://kayapalinakliyat.net/file/nijama.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/farebelurumatitige.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/24951923134.pdfIn PDF document text
    • https://tuinvandecruys.be/file/woxozuposuvanerexademuk.pdfIn PDF document text
    • https://advantage.ee/media/contents/file/gezuwifotilexonu.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/22383817320.pdfIn PDF document text
    • https://ubranni.com/uploader/files/semilakipinulazalirijus.pdfIn PDF document text
    • https://atlantidegattico.it/file/sevijubejazup.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/36859013887.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/90627782226.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/zowager.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/36492173733.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/roxitixogetikubeni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=farming+simulator+2020+unlimited+moneyPDF 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_off0000c512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC512 11024 bytes
SHA-256: 5eba6700faf362efaf8166e6d5b0ecdea7c521c8a2c911b16ef03b904ce3052e
font_01_sfnt_off0000de8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1