Malicious PDF — malware analysis report

Static analysis result for SHA-256 340efebfe7506529…

MALICIOUS

PDF

85.1 KB Created: 2021-08-19 12:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e9f8c0ddea15cc1681706f30256440d0 SHA-1: 2ca6b42e319f5171e94426f600620b2639e72b99 SHA-256: 340efebfe75065297e1fecc2019bf69404b553b3e58c346fdf08dd523c2cbbb0
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, designed to trick users into downloading a secondary malicious PDF. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b34bc3211df---mupetiwuvuxebiloworojob.pdf In PDF document text
    • http://3q1p.com/upload/file/2106271027317500025rl5m4bnw95i.pdfIn PDF document text
    • http://954move.com/clients/4890/File/54336261324.pdfIn PDF document text
    • http://wine-paraphernalia.com/files/winep/_repo/file/pogut.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d80a56a7c---lokutidivolabuman.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160887d69aef5f---22423297240.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/ug8h2n8j8ed0d0kvikat91mhkn/49215148250.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090edb9c1ae5---9178084827.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/tfkj146oemqggnl8bpkm82c62g/fajow.pdfIn PDF document text
    • http://afro-safari.com/upload/files/kabizoxigaliremaf.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/mivujidepowetanimutomazim.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/lowiruvonegibad.pdfPDF link annotation
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/63029206597.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/f8a4ca5db3c0fa432fdbbafa71bdded0/60982756005.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1620746023.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/vijepalusizew.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/menuz.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e955e4af9---13532274766.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2985ea5dd---39286460288.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecd387b23e---95762128070.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/xititedamodi.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16076660a7f808---kalepunurojosiwox.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210811142357.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/l7uq19no0dbaquqvnunv6hqjb1/wagukurepatisinikuleja.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/94160588344.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/jisuvuwunavewejubojobu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=neo+geo+games+free+download+for+windows+xpPDF link annotation
    • 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_off0000e7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBC 10908 bytes
SHA-256: 36f26c55366d2fe2c8f1ab3ad6c2ee95382197d7f25dfae88e9a3ae5614e8a57
font_02_sfnt_off000118ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CA 16788 bytes
SHA-256: 6521b264fecae49899598c7d596af3fc7e46516619ee00a2f0c4aa5a3a87b696

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