Malicious PDF — malware analysis report

Static analysis result for SHA-256 095425706f3680d9…

MALICIOUS

PDF

83.2 KB Created: 2021-09-21 14:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9e169bbd10d7c297cfa086051f928593 SHA-1: c9548e6c5947aebad31790832722c1ca28d7983f SHA-256: 095425706f3680d97fc22b24ced8517cd063446012ccd27c2f1be0b6470bf90d
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to disposable domains or are algorithmically generated, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://www.terresdescaraibes.fr/file/20894481780.pdf In PDF document text
    • https://jagamimpi.org/contents/files/dabulefob.pdfIn PDF document text
    • https://ixiu-23.com/uploads/files/202109200152236160.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/935814048.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/6760528511.pdfIn PDF document text
    • http://metrominicabs.com/survey/userfiles/files/tabufapekixizufelobejuz.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/80654367020.pdfIn PDF document text
    • http://cyclad.org/UserFiles/file/pozulixagaxegexoxotagaz.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/vimejerodutikuv.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/nabesosaniwobi.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/30386247844.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/boturefalawebejukiwewewe.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/vogarefenudok.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/fumaduvorozozetelimelel.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72533820926.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/muvanenizatubusutuk.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/63974060200.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/kixedejak.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/68586460295.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/95565745601.pdfIn PDF document text
    • https://internationallanguagenavigators.com/media/gogezula.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/tegirel.pdfIn PDF document text
    • https://quizai.com/uploads/files/nezadevogerogugekom.pdfIn PDF document text
    • https://smshealthcareservices.com/ckfinder/userfiles/files/vowekoxasefuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=chapters+interactive+stories+hack+apkPDF 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_off0000e0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D1 10616 bytes
SHA-256: c9122bc6117290dd86d6245001dc0b3127dacd3d9e012d03b031a2958a8739ca
font_01_sfnt_off0000f91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91F 17712 bytes
SHA-256: cea11be7192d703e7428667263de633a6df7d08c7d8e0a3ff7af0bd95f0d2166
font_02_sfnt_off00012698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12698 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1