Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a3e8d7fc324375…

MALICIOUS

PDF

57.2 KB Created: 2021-10-01 12:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 31a753815c4785040262f8a5b8af9ec2 SHA-1: 9f8d40f9cbd2be40d5ac683db6c40898507c4667 SHA-256: 86a3e8d7fc324375312254e60612d6b35362c0bc62e0b61f4412e1696237d3da
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of numerous URLs points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.2324

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 https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/jpooa8h4pd8lp7tind2of908qb/tezojivajaganom.pdf In PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/japamizo.pdfIn PDF document text
    • http://tartak-monis.pl/tartak/images/file/domam.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/bapomusajoxudegovavu.pdfIn PDF document text
    • http://apartmany.cucoriedka.sk/data/files/moruwilalopov.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/27453795048.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109130615397867.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/todonamejiju.pdfIn PDF document text
    • http://naturalfurnish.com/userfiles/file/boxusiraxonesikatufepuv.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/17022968930.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/gojofabefid.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/95471641556.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image/files/85564104942.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/61446788639.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/tulapi.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/pubawakulepitepulosaj.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/11657633180.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210923_195637.pdfIn PDF document text
    • http://biswasi.com/userfiles/files/murekow.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/89137043979.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/336c4ea228584b4bd0702849740c0c6f/45596048126.pdfIn PDF document text
    • http://tucholainfo.pl/userfiles/file/pagato.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/tiloruzogazemogekisur.pdfIn PDF document text
    • https://jung-yeunjang.ch/userfiles/file/61451707527.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/gikasizedenaredoli.pdfIn PDF document text
    • http://toroisg.com/public/images/files/wikimatito.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=evolve+steam+key+freePDF 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_off0000b37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB37B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB92 10432 bytes
SHA-256: dcdf7c2c004f7b3515b90d0c027d2ba00f96eb468822f4205302bfcb18503175