Malicious PDF — malware analysis report

Static analysis result for SHA-256 968729febd0b0dbe…

MALICIOUS

PDF

79.8 KB Created: 2021-09-08 16:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e9894c8a8a16e15a313db42dda1bcad1 SHA-1: 9e818e93c573bcc093dfff0fb2dc8b7dccb23b01 SHA-256: 968729febd0b0dbe652858d08f779c262aff13fd1428727b75fd298a3f8ee086
174 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a link farm and uses a password-protected archive lure, suggesting it's designed to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the overall structure point towards a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/97454efa7f113b411de2c46355a61caa/ruduzivepabeket.pdf In PDF document text
    • http://argyleliquidations.com/userfiles/files/30377695427.pdfIn PDF document text
    • http://gemmacapitalgroup.com/foto/file/mefokur.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/roxumugarizunesare.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16130d16fd6120---bajemilixepijumi.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b6a5e27c0---66090334073.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/fozivimagaterakoxufu.pdfIn PDF document text
    • http://home-plast.ru/foto/files/rawoturisakewetezu.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/95756762757.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/93066987565.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/wabapakowoto.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/59597101968.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/34965575735.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/serezibumokutoxu.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/taxarosediwunamivuzodesi.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/juwalanevekumutagokigaki.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/45998053174.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/65884783334.pdfIn PDF document text
    • https://langumeistras.lt/i/File/bixuritofujuf.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/4167270925.pdfIn PDF document text
    • http://bcslaw.hu/admin/fck_upload/file/vubuke.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/lerixixoluvamofobol.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/22902459836.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=remove+password+from+pdf+software+free+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_off0000d22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22C 17916 bytes
SHA-256: b7b30a7e787c4c19a501386dddcfc1d3c53b0adc10577300a2adf09449d1423a
font_01_sfnt_off00010059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10059 10764 bytes
SHA-256: 4e19fef94eb69bd31221d4f0c1fa133aa9e26f688a5808f4f7f8d7965bca1746
font_02_sfnt_off00011931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11931 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1