Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fea6c4ab9e28af6…

MALICIOUS

PDF

54.6 KB Created: 2021-09-23 23:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f0016e4b38f339873d43d98fe02d0f8a SHA-1: 302bfb8a621c8f2675ab79359d01c6fe46a5dc3f SHA-256: 5fea6c4ab9e28af6e083ced3ac1907f33f6dcaeeb565eff75c90a05e64be45b9
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to potentially malicious content, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. ClamAV also detected this file as a phishing trojan. The ML classifier strongly flagged it as malicious, suggesting it's designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8265

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://giasuminhtam.com/Images_upload/files/pokakowid.pdf In PDF document text
    • http://barefoot.pl/userfiles/file/16739650113.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/vorim.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/27765857277.pdfIn PDF document text
    • https://suksesunited.com/contents/files/14214976553.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5e47d5d9f---paxubimozos.pdfIn PDF document text
    • https://buyafranchise.org/files/files/turigipisatibo.pdfIn PDF document text
    • https://timavoshipsupply.it/userfiles/file/65510354513.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/zitewosidamol.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/29340823964.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/zomasizupu.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/jufuz.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/19489555924.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/34617001041.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/59542242192.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/jajituxopemituposobo.pdfIn PDF document text
    • http://cissi.it/userfiles/files/vakem.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/225ef33b8a2c95c9081dc842409a8c13/kekudofiwaxejesufug.pdfIn PDF document text
    • http://vaithun.net/upload/files/wadixorar.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/60912973616.pdfIn PDF document text
    • http://placidlakes.com/larpm/uploads/file/29550278077.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/28060475913.pdfIn PDF document text
    • http://lscapital.it/images/file/zugifu.pdfIn PDF document text
    • http://trivio.it/userfiles/files/54241070663.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/jepebotarunokojib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=2+player+games+iosPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E6 15328 bytes
SHA-256: 85d3ce712e576911fbf3d3b192e30b8ee9bd74167afe6bf2099968095410b405

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