Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5e55bc0bb1bf97…

MALICIOUS

PDF

83.2 KB Created: 2021-08-16 12:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 89facb5c687b0194b2783f1af2bb55f6 SHA-1: 8f3bfd6f9c0c53714f2d8601a0241f33046139b4 SHA-256: 8f5e55bc0bb1bf9794dca8515506a932e5e1f64e117656ceb6995e0a24a74a96
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3358

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 https://synerhu.ru/uplcv?utm_term=kmspico+v9.2.2+%3D+activator+for+windows+10.8.1-7+%2B+office PDF link annotation
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/8g4jk8hln3elvatp7jk9kr6kf2/korofifanedajan.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/kekoraneko.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/58882872ce563f7216681bf21a01365b/55232238288.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/80d1500e3eaba0e45bb6ee15fb494637/85193517681.pdfIn PDF document text
    • http://europavloeren.nl/siteimages/file/56082687921.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/wenam.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/24037983037.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/fonipuketiwiroboxika.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/a330bebeae7c294d7b6f2c1ad5142e0f/10826095578.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607928a74cd80---kidizubopaxopasot.pdfIn PDF document text
    • http://carszana.com/image/upload/File/6387489734.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607907d20a5f0---lumowala.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/bce1bfa7a4a8178591a76f4ed7559e84/92365263607.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/tutazovasifoxuzawinuwepi.pdfIn PDF document text
    • https://marosme.ro/hirek/file/dubegesebilomiw.pdfIn PDF document text
    • http://signauction.net/userfiles/file/sedubonudi.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/fcpbumba3keg7vglok2du46q53/dikipowizebegupejitimixas.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/42e986154fefa914f0d6bcbd75aaf8d6/33503086504.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e250fa02db---40045262796.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/10175229228.pdfIn PDF document text
    • http://meadclassof1991.com/clients/c/cc/cc689d7a74a098ef67b43942063c7ff9/File/pitolezusaxim.pdfIn PDF document text
    • https://pasarantogelsatu.com/contents//files/73328502819.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/86475780004.pdfIn PDF document text
    • 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_off0000fdca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCA 11744 bytes
SHA-256: 5d442d340c0cc573add1259789aadecf91c695a5ae283a76ddf9984a40023c9f
font_01_sfnt_off00011a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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