Malicious PDF — malware analysis report

Static analysis result for SHA-256 a903a5821298eb8c…

MALICIOUS

PDF

87.7 KB Created: 2021-07-02 04:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aad10948347534678aa691a76720a9af SHA-1: 9cc85681c8d387c3594fa8af7621e70dd32ebf4d SHA-256: a903a5821298eb8cca12481a212320915ccc2316f8c69d225700ce918505439a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious content. The presence of a FIFA 18 download lure in one of the URLs indicates a phishing or social engineering tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/39b82ac4d8d8a3e95aac8f59b06c696a/baxadefefivudupobelos.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05cea48edf---69577156679.pdf
    • http://gongotour.com/FileData/ckfinder/files/20210608_6079D3CF53E54C2B.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9cfdc0e50---duvikosazopojifelilozozon.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607525f252930---50435002629.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d9dbc15a6---nujizufuxufomupexopitapad.pdf
    • https://al-farh-iq.com/upload/userfiles/file/12903656845.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d54a203c8---71550972174.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/8fd858ca877b86f2bff8d5ee97176024/pifam.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/8952h8ov2qaqm8n5mlep3jhak0/86172816075.pdf
    • https://autotronics.vn/userfiles/file/36039003376.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/r5rrioa7h3nhdg14tfpiikjta6/90258632908.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca4ed3e017---98954862591.pdf
    • http://fw-simple.com/uploads/files/radirijutabuno.pdf
    • http://cuatro-pr.org/sites/default/files/file/jurenuke.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082884ad28c6---fidasutofosanewewut.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c3d99e6af---86592974141.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a6932a053---75002540173.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/0e7c28969ff0807245cf2c04bfac6bfc/24758941242.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/8eeb9f64c61472ef4d6a2a2c35975af3/25011516580.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ba0a1f600---lipaxagen.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/gazidopomo.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ffb830532---73029237775.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16072be308091e---saxevikiriromalu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=download+fifa+18+android
    • 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_off0000f656.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF656 16792 bytes
font_01_sfnt_off00010e6d.bin
233ced25de1c77ea411cfc5076f5a943d1cd2867b5a3ff1b7147fe6781c04bb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6D 10296 bytes
font_02_sfnt_off000125b5.bin
934611fb5fd61bb1d7de1acec4032627ed718b8364372fc2bc726274c7affb8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x125B5 16936 bytes