Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a267becb5a1e38…

MALICIOUS

PDF

91.8 KB Created: 2021-07-30 00:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fa1dc79f620dd403db3e5106fdeba7a0 SHA-1: 29b542840b71d68014277d7a3524b24f6ee279ce SHA-256: 67a267becb5a1e38ef042f4fe24ee4e1f94aeea4672f559f1e0f02cf93709409
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL findings point towards an attack pattern involving redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/2ae009240407e8ba9e89d55c8c544cf3/sozuvimaburavid.pdf In PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a30c237d1ff---33856286921.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4c5972b28---76467111437.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/22218367521.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160863fe75ca4c---37743944734.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9e3373494---76781236779.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/56294296375.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/7249f5065eb2e44886f207f757cf1a8a/vebewexobepi.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/71143490408.pdfIn PDF document text
    • http://keacg.com/upload/files/15649123106.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/nexilemukojoxupiki.pdfIn PDF document text
    • http://gchs1969.com/clients/867877/File/8681546641.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160760ddda478f---49035327322.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/gomuraxakidim.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160743f18db6a6---kisudunip.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a295a85081---wuvetutolon.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/fujekimirit.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/38274156992.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/b23273aa84629895ad0e51525f7fc628/rulomo.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/2013a7e8977672152d35f9b888cb9987/71216423192.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/xulor.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dee90e8a6---82217194116.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6ca00c4cf---muminitevunowikiroxotuse.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7c318d4f3---46349033553.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/13550329411.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/eeb5cc13eec5f0dae11d401cf21d3548/suginufezaxasikinuku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=example+of+short+telephone+conversation+between+two+friendsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0B 11264 bytes
SHA-256: 53a74aef3435793cb96d1a35d283a24b0d559565e8c630ced0a9ee65c39079f2
font_01_sfnt_off0001151e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151E 18900 bytes
SHA-256: 4012022daf6dc1244f3263be4cf1d31b6fbace5abdbcfaa374a8442e4df09fc4
font_02_sfnt_off00014611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14611 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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