Malicious PDF — malware analysis report

Static analysis result for SHA-256 291a7dad05260c9a…

MALICIOUS

PDF

111.0 KB Created: 2021-06-25 14:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 72b866aeac4b00a3fea031a14a48d386 SHA-1: fd00804bbbf718aa33b641b8f6ff190ada970922 SHA-256: 291a7dad05260c9a7465eb59130b4a32e1e6bce424cedbcc8e5fd674a82fe1fc
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains, likely intended to lead users to malicious content or phishing pages. The presence of multiple external URIs and link farm characteristics strongly suggests a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6282

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://nomylo.ru/uplcv?utm_term=like+the+sun+that+rises+everyday PDF link annotation
    • http://bonfiremadigan.com/uploads/fckeditor/file/xolozamofip.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/9636b95ed23552a705999c2034ffb848/72251983758.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca5f3d43ad---wukimevi.pdfIn PDF document text
    • https://motacademy.it/file/goxepaw.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/909b94674cc648cad2ec7439f8ce08f9/sakabazeniwo.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/jogudukoviduridefokaz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2381754beb---fuvolevitigam.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/relonibifopajipulum.pdfIn PDF document text
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/h1aslg1ojv4imjkb8f8v6d35t6/95029473721.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607064a75d5ff---kelugovukevusosidu.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/38c3fae6f17a13d4ccfc2372bed2f269/talifuwasokumovevomogaj.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/v5te80dfs0ntdunq5to07tf1h2/kovilajiwe.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/82881086181.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608224c307f36---bexukurezulapifazoliguke.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/pekuvedawitonosu.pdfIn PDF document text

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