Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9297f5f66a9f55d…

MALICIOUS

PDF

84.5 KB Created: 2021-09-13 12:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: defbb466da3248e5d45dffd139b06af7 SHA-1: 0074cb949c531fdfb0079a3636bad2bc47e6c878 SHA-256: e9297f5f66a9f55da9b8ba74450d2607d69792d6025ecaf3cb85021e4fe53694
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs pointing to external sites, suggesting a phishing or redirection scheme. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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://manchetenewsms.com.br/ckfinder/userfiles/files/nogaf.pdf In PDF document text
    • http://interno-kazan.ru/upload/files/54856288027.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/44383251586.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/maxumoli.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/ditegagejolimimexifilivaz.pdfIn PDF document text
    • https://tamphuctriland.vn/upload/files/xapuzekiroxidu.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/66750400406.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/10876115356.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/92450046651.pdfIn PDF document text
    • https://hotelpancharatna.com/assets/userfiles/files/zuzafofigewexe.pdfIn PDF document text
    • http://pmke.cz/pictures/files/bafusawatitotawuvijagajoj.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/54488971396.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/xexetalekum.pdfIn PDF document text
    • http://glassick.com/userfiles/file/4351758426.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/83281825981.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/wedekegofo.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339fa49304e---25733247249.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/l3b0t77h353kbv2mb5t6grd112/numezukirun.pdfIn PDF document text
    • https://palet-school.com/files/files/48720622188.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/93750080346.pdfIn PDF document text
    • https://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/93217543060.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/71061606806.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=after+the+wedding+watch+onlinePDF 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_off0000e48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA1 18376 bytes
SHA-256: e758cf2e80ac9c8a174d564f5ad052a882378a442eda40f999247057b3be5898
font_02_sfnt_off00012c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C10 10652 bytes
SHA-256: a4af0606628f6b58aa9e56762a6e4cfa15689b56d1e6117ba306e055caaf3cb4