Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03267bd258e5939…

MALICIOUS

PDF

41.5 KB Created: 2021-07-18 05:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9102788bde537c86a1bce460238117bd SHA-1: 8083610b1dc6e4ac68d595e901a61f09de7396f0 SHA-256: b03267bd258e5939e315a09f8b34aa09f6cd561cc02f172225dfefc27d1eb1d3
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is designed as a lure, presenting itself as an image to trick users into clicking a link. The link farm points to multiple compromised WordPress sites, indicating a phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to deliver a secondary payload or conduct further phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7147

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://getracemirates.com/userfiles/files/89036296011.pdf In PDF document text
    • https://vasantviharproperties.com/userfiles/file/dafefukarizigu.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607b24c00c820---9593207138.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160985324ac4ef---81733897172.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608900b670c44---wugusuwajo.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/navewoxerurapofabaduji.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/81466814820.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/0501ac92c5ff93eccc60bb8427c520d0/lutumi.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/aa04b15c8e70c546bbfeb90ec71c03eb/78752559026.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/f692f12e55417abeab82227b1f3789e0/83342317455.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/71326163569.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/pidizelos.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/lijuvuxid.pdfIn PDF document text
    • http://lyshiying.com/d/files/82391145133.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/dpebm8n5942ji87mjvhecu5cqs/68559743911.pdfIn PDF document text
    • http://sam-global.ch/files/file/jowisikulilijimi.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/zukulalusekalogejevodit.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b19c0598c42---somupebufoxesapilaxodovi.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607418c3c0e89---56806480916.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/dajomimafutesemuzob.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/f0a3dab132c586a5b8bd4bd69b24f8e8/69224830154.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/leq591q9kcq6os2b2bhk4srf96/wepemakaxozobafamigi.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/smqhjfbt2ujuchadofbn0j2odn/73634842039.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=1967+shelby+gt350+for+salePDF link annotation