Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d59f620495555b0…

MALICIOUS

PDF

41.5 KB Created: 2021-06-23 17:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4b814bfeaa9bdc0eb0510379ccae1337 SHA-1: bc89026e76b7135a56305cff3e40bb1219241624 SHA-256: 4d59f620495555b0aea1c0f12a07e6ffd4a484b28c2e3284b1acbde078270bb2
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of a screenshot designed to trick users into clicking embedded links. The numerous external links point to compromised CMS uploads, suggesting a distribution mechanism for further malicious content. No scripts were extracted, but the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8113

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d291ee8477---fatexadavebitumusuvolavip.pdf In PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/jc7nubnj3cl9c66guvdvsnvmqa/28452415536.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/7696826215.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/suparome.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/e26f7c5a90963d78e8d0dde14a0c5458/gixevawemuzexotu.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba88f22fce9---26564907841.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609629a8b94f8---51766833637.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f2cbdf74415a7c4eb3a63f1e42c9f523/24303629038.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0106dca60---rejigu.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608264f87f8b5---47978345272.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/16681578431.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/49818333740.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/22765560577.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940d3fbdc3a---92728662511.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/tugonuduretezupok.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d04a1345c8---52688960376.pdfIn PDF document text
    • http://iphysiology.ru/upload/vovasotowexoxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=the+beato+book+pdf+free+downloadPDF link annotation

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