Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e59df165ea4bab6…

MALICIOUS

PDF

95.2 KB Created: 2021-08-16 14:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7d9076b2f21fbd7e996e2a7876b2c71f SHA-1: 3667fb58673bebbf672bb04899a30e3e3bd03bc9 SHA-256: 3e59df165ea4bab648196ce7c7c488b9b6d8e08222ef47b52b1a254f202f7925
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external sites, many hosted on compromised CMS uploads, suggesting a phishing or malware distribution campaign. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document likely instructs the user to copy and paste commands into a shell, a common technique for executing malicious payloads. No scripts were extracted, but the overall structure and heuristics point to a phishing lure designed to trick users into executing arbitrary commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 https://pistant.ru/uplcv?utm_term=graphing+polar+coordinates+worksheet+pdf PDF link annotation
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2debbdccfe---narobavibenitak.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/49465166189.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a657dc367de---8017014181.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4f66dbdb3---gijujazitax.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/23182542265.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/97781286943.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607db7021191a---mixit.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/1075718693.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/2chr0m4k2m7a3c2piunsqj7kj7/99001193321.pdfIn PDF document text
    • http://lecieldesandes.fr/ckfinder/userfiles/files/warutepudibavoluf.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607843c3639d0---xuviziwolosimufukoxo.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1610b06c01741a---mipox.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e25d32fc3---98596433740.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080447779ce4---kesekuxanu.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160f146f405a87---kusim.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160727c5cb4d9c---jopiratenagevipikoke.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/xatavutoranomazuzezej.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/ktrr166uk90au86g4665nie8vp/gasajibepoleziketipawup.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/fujovose.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/41089664729.pdfIn PDF document text
    • http://bean2beenefamilytree.com/clients/60578/File/90693495747.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/nod8je0tq4keo7gi3ik3uvff17/52280388807.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160941fc320dab---dejudivurulenutisogi.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/7ka32oeo4nugnjsb64veo0atd8/84377564794.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/47534465384.pdfIn PDF document text
    • 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_off00010f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F98 11116 bytes
SHA-256: f173085080e0aadbc3f7df3e6d200edf630c53e8cf010a75873d2d398ca644c7
font_01_sfnt_off00012958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12958 17280 bytes
SHA-256: 5b36a2be9a2268c604a48eb3dcc880112e22efeb8da5832ba8735118a1d04d4b
font_02_sfnt_off00015684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15684 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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