Malicious PDF — malware analysis report

Static analysis result for SHA-256 d910c0248e5df06a…

MALICIOUS

PDF

69.8 KB Created: 2021-09-29 07:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 320d07956fc9618717c50fc618d51c53 SHA-1: f93bcc8a30f70b71f1520c2777b043369c563a96 SHA-256: d910c0248e5df06a00019466c66e7b5df8e84ca8b030f874e831b70eccc5b881
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable domains. These URLs are likely intended to lure users to phishing pages or download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://garglob.ru/uplcv?utm_term=best+web+series+english PDF link annotation
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16144d7024ffdb---35351488084.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/30906765422.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/h7skfbknqb9sa1cejlrroej8iq/kujasoxikawafelinujodug.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/149f56eacf5ffda16487cab1187d02e8/dilubatovegi.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/negexufudiwewegokulowilo.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/welutuledebopu.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/wubapelejoguguji.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/badudesa.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/senutebabekoxodaw.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/gigonavonajupam.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///kavazile.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1614fc3680b2f6---14942207497.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/33385265992.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/mamusgfbr4vir7kso9pbtr12sl/sexenoridobazidigisi.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/161529dd8a6f12---pevodubamenunebi.pdfIn PDF document text
    • http://geoman.cz/data/file/96361396516.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/texujisuvit.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/jasobajadidu.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/keripanigofopivenokeweni.pdfIn PDF document text
    • http://snsi.jp/image/news_file/5114520160.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/wefujenepomorew.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/0aa2aaffb51ff944324c0a3ce7bceb24/genenoraz.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/58110113118.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/69698758753.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16135e6e0851e9---vevirebireremeroz.pdfIn PDF document text
    • 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_off0000b18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB18E 10384 bytes
SHA-256: 93c8e3d990d4bf6169926fcdaf57accd436b54ee206236553de0e606cdd8f3fb
font_01_sfnt_off0000c90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90B 16024 bytes
SHA-256: 4058656fd505a5152c05878f696e7a595f02521a453ba6c45e04cb72ec060bc4
font_02_sfnt_off0000f1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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