Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4dbbc3475ff07bb…

MALICIOUS

PDF

68.6 KB Created: 2021-09-12 15:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b042ff90311e4a1c005e2bba5282ca5e SHA-1: 307d391796d46819f49ba09356d25897c3ad0bad SHA-256: e4dbbc3475ff07bbb87cc3f54a27ca65c75acc39cfb097b50c163b309434c56f
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://synerhu.ru/uplcv?utm_term=rct+touch+apk+mod
    • https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/35426650451.pdf
    • http://rts-3.ru/upload/files/34903623218.pdf
    • https://sreekanakananda.com/ckfinder/userfiles/files/69141227889.pdf
    • http://spbmedaks.ru/sites/default/files/uploads/39147911515.pdf
    • http://cdjuchuan.com/upload/files/40309147655.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/a72d3b25cb96a7e4f5c36205cb6ab797/16359868111.pdf
    • https://mysilo.com/upload/ckfinder/files/zufomomodabisunelak.pdf
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/81601420445.pdf
    • http://dongzzang.com/userfiles/file///gotegabagufojijitewiva.pdf
    • https://omegaplus.bg/uploads/pages/files/45030592150.pdf
    • http://lingeriedediva.com/UploadFile/file/2021090701545473499.pdf
    • http://csaladiegyteruautok.hu/userfiles/files/85093134824.pdf
    • https://hotelmitrutarija.com/uploaded/files/84055045303.pdf
    • http://gz-chengeng.com/uploadfile/files/fujotu.pdf
    • https://karapinarinsaat.net/userfiles/upload/file/sapitofadomamafudumax.pdf
    • http://amindoost.ir/images/upload/files/39721936816.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138518f19077---6421167025.pdf
    • http://budaors.varosom.hu/userfiles/files/wexifozufevolug.pdf
    • http://icltindia.in/userfiles/file/mijise.pdf
    • http://malopolskiszlakwinny.pl/upload/File/29335486054.pdf
    • https://www.seblocation.com/ckfinder/userfiles/files/71053977900.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae1b.bin
25f04743d40992e87f72e7bd5f5bfea97828279fa98e1959c2c5920ed4791828		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE1B 15616 bytes
font_01_sfnt_off0000d61d.bin
fede09277b38deb2a7cb8a3f094412de0820cfafaa9505348b2e9f44e10876dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD61D 10372 bytes
font_02_sfnt_off0000eda4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA4 16792 bytes

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