Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbee33443f30aef7…

MALICIOUS

PDF

90.7 KB Created: 2021-08-18 05:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2b9573ae2752d94af4d189ce8c193793 SHA-1: 5d807db876ddc54bf4964a0a630d214f5895188b SHA-256: fbee33443f30aef70d8dc4cc40e1d93a8a2bc5b63ab3b97325f263ac999ff390
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS uploads or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple links on potentially untrusted hosting suggests a coordinated effort to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbea978c80---toninetoton.pdf In PDF document text
    • https://unique-u.biz/images/uploads/file/donemakesonodivakigazopum.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/22894337121.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bed04e50f4f---nusibuvawesotubaku.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/b1d0270ed2227a5b62f842fd784c4e09/46863105833.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/turavogonulili.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/760684590.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/2fi5554jbe44hfv3k4d7odoo0b/11025308001.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/rejagesa.pdfIn PDF document text
    • https://lordoptika.hu/files/files/lixum.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4b82027e---kojozisev.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/6772939911.pdfIn PDF document text
    • http://deauville.ru/files/file/2148783847.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/80534424365.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/6b3ffac4a2a52ffc9aad08bcf5c6e2fc/gibibukojogefeg.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/74483326929.pdfIn PDF document text
    • https://solucionaesp.com/ckfinder/userfiles/files/88998277237.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/48658868451.pdfIn PDF document text
    • http://xn----dtbfdwc0aaaev8k.xn--p1ai/ckfinder/userfiles/files/85603275776.pdfIn PDF document text
    • http://tulsamemorialclassof71.com/clients/84987/File/64628032353.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/cf7accafaf185d495c9af2a0b5f13a56/45842812989.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/ronadirani.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/fn72a77cgs68kduis2lr8a7nvh/10841724392.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/jumebedub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=bahubali+2+songs+telugu+movie+downloadPDF 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_off0000fe9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000116af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AF 16920 bytes
SHA-256: cb465e2005a1008ed6b056e0d9bbc3a7c8781e2e8bf98eff9016a46542fbaa1e
font_02_sfnt_off00014302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14302 11160 bytes
SHA-256: f8008fc1c6aed37cae1730c8d346915c70c1101822fce436d85943bb5683e3e7

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