Malicious PDF — malware analysis report

Static analysis result for SHA-256 293ed9845d19a9ef…

MALICIOUS

PDF

94.9 KB Created: 2021-10-16 00:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 14340f72760a07335cb34753bd067b6a SHA-1: db7b77ac31a06f63e56ee863a49db1b2c58ac9f6 SHA-256: 293ed9845d19a9ef11e1d534e0d5df874c6c3dc32373b4700ff86fded72f3b62
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JS points to T1059.007, and the overall delivery mechanism is consistent with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://nomylo.ru/uplcv?utm_term=perry+mason+the+case+of+the+buried+clock PDF link annotation
    • http://gemcom.org/userfiles/file/27433833426.pdfIn PDF document text
    • http://opt-russtd.ru/data_center/upload_pictures/file/pizazexowiwolerafewegume.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/29793668467.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/lovawawikutejefos.pdfIn PDF document text
    • http://mackits.eu/image/56991370493.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a3ff4b876cf69dd9caa68f4f0029125f/xorevelanapataboniwaxi.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/zilitam.pdfIn PDF document text
    • http://abdon.madteam.net/ckfinder/userfiles/files/gasegozejidesesazuxawuxi.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614afce778768---ribuwuwafokobagesusonijar.pdfIn PDF document text
    • https://aayams.com/userfiles/file/21207583798.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/nusitisoj.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/tisesidefekoxupo.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/lumeronekagoxigudigan.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/lasor.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/35944846749.pdfIn PDF document text
    • http://haphadoor.com/upload/files/putexowuxobi.pdfIn PDF document text
    • http://insei.eu/userfiles/files/91014892670.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/mizijeziwuwuzukirolowebod.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/91127590179.pdfIn PDF document text
    • https://arenerachicamocha.sinecsas.com/ckfinder/userfiles/files/30579342345.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/65878058306.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/vevapopekitawezazozibaxug.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/62140763940.pdfIn PDF document text
    • 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_off00010979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10979 18988 bytes
SHA-256: 56f9822009284084e0436a8a97d47dfc1cc119f88ed9773b154e7f4e86c06856
font_01_sfnt_off00013b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B4A 11188 bytes
SHA-256: 95a82aa4d7848dc4fa47558538f08f9dc11261b3ef0080f6434d43a221bb9f9d
font_02_sfnt_off0001554d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1554D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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