Malicious PDF — malware analysis report

Static analysis result for SHA-256 78891d09ec931bab…

MALICIOUS

PDF

51.6 KB Created: 2021-09-02 10:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 14ae13bf7b496e49c7c7c9e3a38374cd SHA-1: d04bccfed45adf4174b3b80a12e9236c7c4684a8 SHA-256: 78891d09ec931bab6bd2e5cc9e5bfb902f39e7e42db92c353ba8a907a09760b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as a phishing trojan and an ML classifier indicated maliciousness. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a phishing or scam campaign. The presence of multiple external URIs and link farms indicates an attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8793

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://smidgel.ru/uplcv?utm_term=meaning+of+volution PDF link annotation
    • http://ediliziaunoaventi.com/userfiles/files/kibezowa.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/palufeji.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835f55e1f7e---merebavorigovokir.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/74791838977.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/40932361873.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/74467281983.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098126206e93---saviwabedawabazulasulaz.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/safezagixunik.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cd73020e9---kokosaxevatanojed.pdfIn PDF document text
    • http://stylekd.ru/files/nidetezojasasenusazefike.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4475512f96---notowawuwesegasewawa.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160f649636e2cd---megaluneviwem.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/tfe10glm70o5k8n1ic7jkgr981/2250114186.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/01a52b57112a6495fa03fca70c56b457/72386126922.pdfIn PDF document text
    • http://dalaichau.com/files/897485178.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/97417930559.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a9cfa9a7b---roteraju.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/zomodewudujixomuverap.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/suziveva.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/128c40d5a14ec4eecc00d5e9087daea7/xibufemepagipaxitulu.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1d3c78779---kelod.pdfIn PDF document text
    • https://citytrafik.nu/images/file/runetigutufojubofofumej.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1610e9d763505e---xikilomakotujofixi.pdfIn PDF document text

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