Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d8211c992fc3c2…

MALICIOUS

PDF

99.4 KB Created: 2021-07-01 11:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 561569d5558634b4a8b52efdf5122975 SHA-1: 99a110031a9858a14922f9072545003a74c2fda8 SHA-256: c0d8211c992fc3c2200bcf62724fe5b883e8e26a3c944e12be919b61fe33a184
156 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 a machine learning classifier. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of external URIs and a link farm indicates a likely spearphishing attachment vector, leading to client execution via exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 https://coretry.ru/uplcv?utm_term=how+to+make+a+redstone+cannon
    • https://rajatotogroup3.com/contents//files/dugonop.pdf
    • http://randoquad72.fr/userfiles/file/segurenananodokupa.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/52514464fc7d6b678b5fa07fbbfb688a/rodiviwegogurorelot.pdf
    • http://21cedu.com/pds/userfiles/files/87851236494.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/d026a381354617aa7fce73cb6c4d7433/90203498075.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e346de251b---jusafukigoma.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/ffp1nc1mnv62t7vn65at692aro/64019336480.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/d94878fdde4039e4a08ee3091ed6280c/poxidugokurazux.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/835ee1c9f844af72882094b9cdc00c4d/31251873937.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/volee5fh7ja5oueom078in7pat/73172229601.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/14269b03281cdc0bb50c0acfef583586/gukimagefa.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/6786de34205fa598585e23676dffdaa5/71020354611.pdf
    • http://www.dismaplant.com/ckfinder/userfiles/files/81854011794.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/d0295e2ca22839470fb729879edff78b/81760540489.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/d49aea18a52d02c575f9a9e31e2d3f6a/35244322613.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/bdaa9f8c109b6ce7b4542691d9c98cc5/31862776873.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/ef1bd7a5a5e6fb235ac35ddccd1021c9/jakulerisoguwisomexu.pdf
    • http://allg-gyn.ch/userfiles/file/wozurafixokopeziguxepe.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/2a67eec861c68c70c4ea514af7337d0f/siwetuwiju.pdf
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/lapotemekefuwowide.pdf
    • http://dichvugiayphep.biz/upload/ck/files/29589378369.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cc454eae338---10426263939.pdf
    • https://harrisitalia.it/uploads/file/jokujosulo.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/c06a0fa657a15faefe1162b61b9fe4b3/magedejopa.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_off00011bb7.bin
6e6b73f0499bc09c18143e561065bfbc7709e1ddf8ae592721c79758469f5ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB7 20460 bytes
font_01_sfnt_off00014fea.bin
7af85e4594bc8cc7dd63353e01b68a3f79fa4b7bca9dfb593ff62fa28852df11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FEA 10560 bytes
font_02_sfnt_off0001680c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1680C 16792 bytes

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