Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be962aaf6071773…

MALICIOUS

PDF

77.5 KB Created: 2021-09-08 17:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 74dd3dc2791387e761cf37a695a7adcb SHA-1: 9f392479b3f148740eec3d79e5b9a21400321c33 SHA-256: 5be962aaf6071773404553a777f6084b1b606691a6fd6dca12613e28b108441c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates that the document likely contains numerous links to disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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://xnkvinatimex.com/uploads/files/fezejofunimilebalax.pdf In PDF document text
    • http://burattinojatek.hu/userfiles/file/9959642551.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/67893347194.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4726187473.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/a12aa7c38d08c6a0faae7c14b870d3d5/19764036364.pdfIn PDF document text
    • https://rajakedua.com/contents/files/jupofenawasojo.pdfIn PDF document text
    • http://sun-dr.com/uploads/files/202109051048015739.pdfIn PDF document text
    • http://quiltingacademy.net/fckeditor/userfiles/file/gunipodorapeko.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/5498130216138c53f5ee14.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c46d552ef---daluxasodigazajuwe.pdfIn PDF document text
    • https://htchninc.com/d/files/10671206899.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/kiniv.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/xodegunubagenegidexevilaz.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/divofapote.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/76336096106.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/kifebofisiwifu.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/37972824434.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/13911143452.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/22634373246.pdfIn PDF document text
    • https://bharatceramics.in/ckfinder/userfiles/files/6146597518.pdfIn PDF document text
    • http://wiskind.com/filespath/files/20210905022100.pdfIn PDF document text
    • http://trieuduong.com/images/Download/52637754322.pdfIn PDF document text
    • http://fitviewer.com/files/file/ferawomud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=elliot+wave+techniques+simplified+pdfPDF 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_off0000ca4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE261 17012 bytes
SHA-256: a3449ca50387c1d44462a77b19f50de212c827052ff066efe0752ae26870582f
font_02_sfnt_off00010e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E37 11164 bytes
SHA-256: c01e4dc8d1ac0af304b4b2bdded1868d892e93ad597b969ee1db20086b29f3f0

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