Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcae4a7273cd0608…

MALICIOUS

PDF

83.1 KB Created: 2021-09-06 07:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d6a843b436f31c83d6bb73dcfb1ba2d5 SHA-1: fa58f86cb63c0b5c437ac2bb9fba99d83ba7f398 SHA-256: bcae4a7273cd0608f253539fb23d5802cd24f28f8638397a8782833604af9b95
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the nature of the heuristics indicate that the document's primary function is to redirect users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://kawoka.com/userfiles/file/kumovuzomubarega.pdf In PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/7b6d33ddd23394181612e2b6eb15d1bd/tumunijibigog.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/pisuvob.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/75d271ccc5d348c02c7c2de64a50ec54/vamaninovil.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f4b56a4f823---724912406.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/5614834366.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/33728535577.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/zinoferofazenudenibotiji.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/kakefepipefedikojuwesebew.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/29627826545.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135245bdf2b1---7643179687.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/sogikikurerot.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/29503940371.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/fenajapenotitiresefoboza.pdfIn PDF document text
    • http://unityproductions.com/upload/files/mumurexutixe.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/bbfac36304bfe8c397067a60ee692dea/pefelulafujijerawipu.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/wefutapeguguxemidi.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070cff6727fc---fuwugadesikope.pdfIn PDF document text
    • http://alwaysfavorentertainment.com/clients/879371/File/figunipiguxiwutisexi.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df5138995e7---poboboguxodibarofowuwajaf.pdfIn PDF document text
    • https://ka-base.no/images_content/file/22530818736.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161217e212487f---sulovuvawekireradaz.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/6s1bacsisfc84hj56gml89sfmh/ruwugemevawuj.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/85645988141.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=ews+reservation+bill+pdf+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_off0000dde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F5 18160 bytes
SHA-256: 967e620f96a10b49bbe7c243be46e48697ec351d7d29c6c6b0e290ce23fbdcdf
font_02_sfnt_off000125f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F9 10768 bytes
SHA-256: 442e24ef424baac0afd10ede3cda8e3cc6cbe177f22d6f4080abe44def464998

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