Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0aefe8115d77c4f…

MALICIOUS

PDF

58.5 KB Created: 2021-04-30 07:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1489ed2da2c7c79166435866ba7e4cb0 SHA-1: 18e40b91a0792e65cdabceef834e902ad1c92c32 SHA-256: b0aefe8115d77c4f646670950cb544861ee727d7c991c3cf7806c12d2b43e18a
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to movie search results, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9751

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://alliusie.com/userfiles/file/1732358427.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7ab9b6873---61772540750.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd02ed2326---63099547747.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/6cf61qjrmq3thnnooj2os5hs87/dumubibadowesaluf.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcb3ee4e1f---kukosasi.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/25a6e449ea6e84510d8366e1ddd36564/32627189777.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b62669deaf---pivuw.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0fb620053---51819339701.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/2f620224709387ba5a387478f3d76412/15086508426.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/d3327143e39f47b61c6f23ca5d363bb0/bogifatifixoz.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c76f8bbd4---mawapuji.pdf
    • https://rybczewice.pl/userfiles/file/67880761863.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d25c7c42c---zozexutenoramutasavuzope.pdf
    • https://tavio.ru/files/file/berivigipupotirekatuzonu.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089c381999d6---gitedalidatumipokebitik.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef217becfa---nesanapotago.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=majnu+bengali+movie+video+songs
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c181.bin
b205da680f73ecbe7d21fd842432daf8359db35cd0893728408b1a139c7427dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC181 5328 bytes

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