Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52657aa01bafd7e…

MALICIOUS

PDF

92.9 KB Created: 2021-08-23 12:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3926655c29d78f1628180a2c9147c311 SHA-1: e9248f02f97b1321b5b5e45005111ef8a1211856 SHA-256: a52657aa01bafd7ea466aaf8b4daf18ded8508e179a2688c270af07630978ef0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely contains malicious content. The heuristics reveal it functions as a link farm, directing users to various websites, some of which are hosted on compromised CMS upload directories. The primary purpose appears to be to lure users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7094

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://fcvperu.org/data/fcvperu/userfiles/file/42463631514.pdf In PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085af8f08a2f---25456257397.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/c7f6903447855edc86931fb0c01bddb3/nosatunososudej.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/7751rp532ltk02bh31lsstnikl/xagivavekizarateg.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/6f38390e45a59f1589fca9ab980e8d72/27315741767.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf458a6fe8---lavomovorabetagaxikiwalop.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/19903056081.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ci40k0povc91jkeea6u4hsnds2/fowuwezoj.pdfIn PDF document text
    • https://digireg.nz/upload/87400901359.pdfIn PDF document text
    • http://maytinhgth.com/userfiles/file/dupixov.pdfIn PDF document text
    • http://webursitet.org/Files/file/17450218077.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/f03ikmn4dd9797b815v1a2ag9q/82358337710.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/84932164586.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/a4a39765db8d14a038bd7c73b8300b2c/masetatakax.pdfIn PDF document text
    • http://qlionshousing.ca/userfiles/file/lilubelirewiboj.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/39364727238.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c910c266ac---nirane.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/pivalemesudobizukugaz.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/98803846620.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/ffc4ac9ece326ec09cbeeeb7d2b7edf8/49700336552.pdfIn PDF document text
    • https://bnovum.hu/downloads/dumisopubitunagu.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/dusowobifuzaripotonos.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/3ovks0c6s0bv10cl87l54l0g42/61449860897.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/21130117369.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6c2500738---xonupagibir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=apogee+and+perigee+of+earthPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000138ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138CA 22972 bytes
SHA-256: 9f9659c5774d5bd4d49dc8a436fb6239f7011e656fbbae9dacf51ed892f61869

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