Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0eccce930f48d1d…

MALICIOUS

PDF

80.4 KB Created: 2021-09-17 03:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 347b43f71b1cef7cac6e3de87e4ec189 SHA-1: 7d5b12d8f951b781d0183bf12ac470daf1e86b1e SHA-256: b0eccce930f48d1d9f6c208033fae3670c51131227892c058e5363f33ab6a2e3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://u-spot.biz/js/ckfinder/userfiles/files/80966052627.pdf In PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/e46ba6d4e20990a2d3a6df6d1a2c803d/54868929171.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/88856035092.pdfIn PDF document text
    • https://artbynela.com/uploads/file/sutijesas.pdfIn PDF document text
    • http://fohow77.ru/upload/file/funokiwamejaroxelilewoxol.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/nuguwanegavopo.pdfIn PDF document text
    • http://yourhandmadeitems.com/userfiles/file/2472482417.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/18610047060.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/10169237388.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/sojivutulezosunipi.pdfIn PDF document text
    • https://gres-k.cat/userfiles/file/wakufixajowikuvorenatif.pdfIn PDF document text
    • http://gzcil.com/uploadfile/files/sanalaxuzinakebinava.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/97732565920.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/lobogowukelebekedope.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/pipor.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/27175209973.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/64095363471.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109122032462448.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/wavilekasisedilavawufevun.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/fabevuxopodezesagidewelin.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/wivajoximexazik.pdfIn PDF document text
    • http://thaifilmind.com/UserFiles/file/37372732606.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/20219111529208870.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/wetotakejufexaxuvab.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/pufuropopusomanegoxawu.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/molawikojatudifaxipib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=wwe+2k20+apk+game+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_off0000d581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD581 10692 bytes
SHA-256: 1019e6ffe3b683bf10a771af5eab01d71f7676e3ed5eb8426f071aee8348a84b
font_01_sfnt_off0000eddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDC 17804 bytes
SHA-256: bccbb374d76497331efc422163d7286db7e262e50d4067b939001f179a1ca126
font_02_sfnt_off00011bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1