Malicious PDF — malware analysis report

Static analysis result for SHA-256 464df960fca0440f…

MALICIOUS

PDF

85.9 KB Created: 2021-07-03 12:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b63d8b57a80dc8ee5bc9115ca5da8513 SHA-1: 03f45770685a14a15d86e20ca83d9795590bffae SHA-256: 464df960fca0440f151a6488d4b446c490baac1ae803146405047391ee165318
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs pointing to compromised CMS upload storage and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://fiberglasssupplydepot.com/userfiles/files/basemigoputuf.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/bd07ab4d50a3fd3b1d5c34fa07907ecd/nijabiwuw.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/329bf6c444853563df5fee3c58254a7a/delumisodilapovulikuva.pdf
    • http://goldnumber.info/userfiles/file/surevij.pdf
    • http://www.moyekolodin.com/files/32882149600.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fb79565bb---xokumifejo.pdf
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/dajumibosixajuromumur.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc016316b157239fab96ca3509e2476b/puxowene.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc0f289bd9---51501428517.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cda8e2f1a58---85523371373.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075bff7badc7---96973149517.pdf
    • https://hyosungulf.com/uploads/file/26150925723.pdf
    • http://ackerviewguesthouse.com/userfiles/file/28877527714.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c02ddaa5d69---81795935339.pdf
    • http://www.tomasjelinek.com/img/pub/file/44355714262.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/aqhao0l427nbg8jamcc2ofok0p/josuvadetedoj.pdf
    • http://aircond.md/upload_fck/file/pixetolijuwizivuwowi.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a85be33f2---lidebivibemekoj.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608329d088804---68833128455.pdf
    • http://geoodwierty.pl/files/file/26240650685.pdf
    • https://aterhesseg.com/up_image/file/mizewopekel.pdf
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/30442536301.pdf
    • http://allasclub.com/campannas/file/xokodopeb.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3234f74ce3---lazibudubeniluxe.pdf
    • http://accessiblevehicleservices.com/userfiles/file/jaranenedipogateda.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/0n47ovarajrk0hdph63jqmfee6/64774405109.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=caption+about+thinking+about+love
    • 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_off0000ee7e.bin
8a7e5d7afa88b2ccc834870b266d67e08787b843ee1d741f9d1b40c71d2d3c11
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7E 16864 bytes
font_01_sfnt_off00011992.bin
de397fe32352a39d2acafeb04a88e83e2b1eb96bcfda6ddf3ddee5b747e0a830
pdf-font-stream PDF embedded font (sfnt) at offset 0x11992 10692 bytes
font_02_sfnt_off000131da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x131DA 16792 bytes