Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ee8519d12f4fbe…

MALICIOUS

PDF

92.0 KB Created: 2021-07-01 13:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c63f4eb1b824949b442b1757e7ee88db SHA-1: 4c70f3bdad1cdf4da644a8aeb72715799d8df26f SHA-256: 87ee8519d12f4fbe5ccd9a336885e2a1c699588cedb00353402b1faa24f226f7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, with heuristics indicating it contains lottery or parcel delivery lures. It contains numerous links pointing to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://wastran.ru/uplcv?utm_term=full+charge+airpods+pro
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/gp28r4a6ol7i8loffrhf68ml6f/tolipumusoki.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/7ae1opbh2l796qi7t8h2n5a90g/75964738707.pdf
    • http://dailyxedayhang.com/userfiles/files/92205898559.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d971fb5a0cb---12885836343.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775e12dcba5---84718009200.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f1bb0d55c---tesawuwodoposozukofena.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609da7c0e8cd6---gemolup.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/c4842c6d6a90dc600ff9a4a4b30b7ce3/88092755261.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/69a790e119f1cb5dd1eaa8c89c8ad0e1/kazukiwizulozibodi.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b9e9d6694---5253510068.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9625369ab---34011979121.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/46001524ee68ebdf622033fb103ae757/87845045190.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b67fadd010---rokaralerabemot.pdf
    • http://davidlbrooks.com/clients/868292/File/ruxazab.pdf
    • https://limmaginebistrot.com/file/90648843.pdf
    • https://kodcomputers.ro/2664/uploads/5761033839.pdf
    • http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/70724451185.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d60352e3f7---24946733183.pdf
    • http://abwingsde.com/uploads/files/26613438056.pdf
    • http://malabarisproducoes.com/arquivos/files/fofuwo.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a966a504de---dotewatixoguwaviwib.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/6748ba4s4jet0748gvhj0s9v78/zejibuk.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbde43ca8d---49694084373.pdf
    • http://autoset66.ru/admin/ckfinder/userfiles/files/pavibemedokapasivajek.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c96313830c5---57266795411.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010420.bin
b98ad422a9e5b7ae6b3c9e16efb2dc12067712b21c837ee01f27c2970df1bba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10420 10668 bytes
font_01_sfnt_off00011c6b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6B 16792 bytes
font_02_sfnt_off0001347d.bin
6d34e609a5242ffe49a08c58e7493cfe25050a0fe5dd8ca071ed59b239b622dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1347D 17092 bytes

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