Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ccbdb414eec9c2c…

MALICIOUS

PDF

101.5 KB Created: 2021-09-04 09:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3a52d1c57bbe1d79be6878f770f5094c SHA-1: 1a8e98b81281aa80cde9a67412a9a645e67427bb SHA-256: 4ccbdb414eec9c2c75980f7cf18672fb2d18d71c934d1554817851914918b98f
154 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 compromised WordPress sites. Heuristics indicate this is a link farm designed to lure users to these sites, potentially for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5948

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://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609756b29f072---naxunorasedaxikelelovuv.pdf In PDF document text
    • http://mikailang.net/userfiles/file/20210508085030_283474420.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-12/20210612132845301019.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/51307470923.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/piworimukevez.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/safamipijetasanaxobovor.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/79871078352.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/fokadapusabilobalopa.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d8dd4353c34---komevofevobapipabivosuve.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/rumokujan.pdfIn PDF document text
    • http://farashimirooz.com/files/85906758916.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/3f745733ed72b37dd5fd587611074051/17747130103.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/43805545730.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16084faf0687ca---tizubixolaromeluf.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/18141756809.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/8036736919.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c87d313ef45---88314350416.pdfIn PDF document text
    • http://ydyb.com/filespath/files/20210817042204.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c518d63c2---mozuwutesikizuxemul.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/xonogejonal.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160743d397bb34---37770165393.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/xebixejuxefofigedubedoz.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/0f66f0c2a60dd18af92617c28ba5eb9b/74752318469.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/rotipuzezusapeguladibode.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=portfolio+assessment+in+education+pdfPDF link annotation
    • http://s250801404.onlinehome.fr/img/uploaded/file/73065996442.pdfIn PDF document text
    • 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_off00016fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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