Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ca2e286ecb952f…

MALICIOUS

PDF

89.5 KB Created: 2021-09-18 17:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1f9f06bd5f449d08f3e6b2a40e144664 SHA-1: e3964af519d0c8d38fce896c44898c6637beed99 SHA-256: 92ca2e286ecb952fd11bb54e3ee7617fabb423a9e603b5e5e47f050c6b38fb4e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. The PDF also features a link farm with numerous URLs, some hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious sites or download further payloads. The presence of embedded JavaScript indicates a potential for client-side exploitation or execution of malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=beautiful+launcher+for+android PDF link annotation
    • http://retroldn.com/userfiles/file/41203852553.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/97932617410.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/67770949444.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/lonuta.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16144077435f94---57727849506.pdfIn PDF document text
    • http://kaus21.com/userData/board/file/surifezovejazu.pdfIn PDF document text
    • https://hongmao.tw/uploads/files/202109051949564590.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/42859384707.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/bidifogabogonaru.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/43921103366.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f94cc08d6d---nedorex.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/14542922168.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/lekavubikiki.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/miwom.pdfIn PDF document text
    • https://umutfm.com/resimler/files/85472168614.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///tubakifosolina.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614287a49c6ee---xevozivujirojejabisit.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/zosif.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/sosom.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/epph1mqjikabi3bigvlaf86asu/mevaroxotipaluxipunutew.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0841081c8---sumotezexepe.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-13/20210913203435792764.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/41978225500.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140bb3d3e3bf---79883104010.pdfIn PDF document text
    • http://agama-rc.com/upload/files/sepomavuvu.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_off0000f639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF639 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4B 19252 bytes
SHA-256: 1238197f442750c1d0c45c00f345d5908d329d6aad3ddf9c92651c9871406f02
font_02_sfnt_off0001406a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1406A 10560 bytes
SHA-256: bd7bbb89d72f28bb2aeb079dc7f3e620adc166d433feccaa9f6f9b8f5548f8e7

Open this report in the interactive analyzer, or submit your own file for analysis.