Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3c844e1d591104…

MALICIOUS

PDF

49.0 KB Created: 2021-06-03 11:12:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 953095f18ccfbe36539f1162d733d341 SHA-1: 4008497faa054da1ac190fad9071b0a273cfd787 SHA-256: ce3c844e1d5911049608faa58415251d450c6cde7ed3b203d47a6dc8408e89c6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. While no scripts were extracted, the presence of embedded URLs and the ML classifier's high confidence suggest the document is designed to redirect users to a malicious site, likely for further exploitation or malware delivery. The document's content and heuristics indicate a social engineering tactic to trick users into visiting a potentially harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://netcdn.online/app/431946152/free-robux-without-human-verification-game-hack PDF link annotation
    • http://opac.library.uib.ac.id/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-rules_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/tiktok-free-gas_GM835599320.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B5 27524 bytes
SHA-256: 220a56c480d1a3cb5c8876bcc87408c9a6328873c78f45f5e535e76187eeadb8
font_01_sfnt_off00009096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9096 2824 bytes
SHA-256: 1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189
font_02_sfnt_off00009a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A43 19224 bytes
SHA-256: 69162c0303826e3a88150cee7b6b12b50ba56e04bc46253c0e5eb9f80ac8a399

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