Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa7a99f1f2c0e07…

MALICIOUS

PDF

80.4 KB Created: 2021-09-09 13:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: da15d91b16b84b06ddfcf665eefa0744 SHA-1: ea1a0287a5c9880987f7214e53c879b27e2424d5 SHA-256: 6fa7a99f1f2c0e075d0cfb88ee0f6c27e1aa17f6bbf58fe5028955f270fad045
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The PDF contains numerous embedded URLs pointing to a link farm, suggesting a phishing or malware distribution scheme. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5466

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sklepbonus.pl/userfiles/file/rofobewifazemobim.pdf In PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/93510992.pdfIn PDF document text
    • http://futboltotal.net/images/files/bejuwu.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/11001173532.pdfIn PDF document text
    • http://iscyber.com/userfiles/files/20799493011.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/nilob.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/pomuxinokikubuki.pdfIn PDF document text
    • http://avvolodin.ru/upload/file/lasekulikagabodavodadadi.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/12963746699.pdfIn PDF document text
    • http://elfast.ru/userfiles/file/46435587384.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/1182984002.pdfIn PDF document text
    • http://avs-market.ru/admin/ckfinder/userfiles/files/54059479082.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210903105621.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/58366972410.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/bujawuwufakoz.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/52e5d8315e2ceab9a28439ba1411026a/zumav.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/25401852758.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/vagawifexani.pdfIn PDF document text
    • http://trieuduong.com/images/Download/tubumat.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/37812194315.pdfIn PDF document text
    • http://gpkoaee.ru/ckfinder/userfiles/files/39276828287.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/xemazururabagup.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109011750537643.pdfIn PDF document text
    • http://muasamhangmy.com/ckfinder/userfiles/files/mugutezifazoduri.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/52775231834.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16134d80a0d4ca---45880653993.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=can+u+put+itunes+on+android+phonePDF 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_off0000f414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF414 17748 bytes
SHA-256: e7fa58dfe612f03197363d46e852409ed52b1e4559cd9db02bf9c0802a913063
font_01_sfnt_off0001220d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1