Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad6f206d16eec91…

MALICIOUS

PDF

107.5 KB Created: 2021-09-06 07:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 86f6f5402cc972b31ac3f65f86b77398 SHA-1: 0cabeaa3b5505d5f5ee80516b9510eab7e242c2f SHA-256: 9ad6f206d16eec9121ba49ffc94665a6fb84dfcc243c011c79f893b4531105bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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
  • 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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf001da52c---75577496459.pdf In PDF document text
    • http://roycraft.ca/userfiles/file/kebetapezodosikuxit.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/31291340551.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39a1381261---xuzugijilepisamufebirav.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/66531315518.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/sujilusupilomevoregigipom.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/66599602083.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/66k93vvsen4o5g0q2eeikevap3/87202342379.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/konuwurepa.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ed7c21c29---16184238199.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/3a47dcbfcfc7ea117062cbe5bf0ed33e/24298272061.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/tr4up7l5j60nf4i1elrtc5mjt8/gosovikunag.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/f8772a666f524c4c9f868d48f809732e/majiliteloxilojifik.pdfIn PDF document text
    • http://enewind.com/pliki/file/kexufufadosor.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed929137d0---66795316342.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a216c83c63e---96450969331.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/nanogefaso.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/lenisa.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/70702313599.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/20db48e5ec37c8548829279590b33929/35532005486.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab816da1276---bomojutuvuxurizatuduwawe.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/73269647235.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b7b0344f6---mudonoriwowebakuzud.pdfIn PDF document text
    • https://tessuno.com/upload/files/60ee45bf69d9a.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=generics+in+java+pdf+free+downloadPDF 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_off00013a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A94 10836 bytes
SHA-256: 0d3b9490be3c634a9fffd58cc833bcd05c91d4b7dfe3ed18f09476cbd6a61c10
font_01_sfnt_off000153b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153B9 20036 bytes
SHA-256: 889a55f523d6da19c8b42eb4d77f5d6f196f1fb75ed7baeb72a5ed4310064a2f
font_02_sfnt_off0001882d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1882D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1