Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a6682e297235f4…

MALICIOUS

PDF

47.5 KB Created: 2021-06-11 01:16:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 97f037bb14335fb38b5f699dc4b9558d SHA-1: eea39d22fbbb39c8e6d9a65061a96277c9b43b5c SHA-256: 79a6682e297235f47ce06cb4f81035a582dba6cf9d68759ea491b32fbacc46ec
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-severity heuristic indicating it links to a game hack lure, specifically pointing to a URL associated with Roblox exploits. The ML classifier also flagged the PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/jailbreak-hack-roblox-script-pastebin-game-hack PDF link annotation
    • https://lib.btkljogja.or.id/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-no-survays_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-free-robux-plugin_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-hack-deutsch_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/download-hacks-for-roblox-cheating-in-assasin_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-on-phone-no-download_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/funny-roblox-avatar-ideas-free_GM431946152.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_off00004f94.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F94 25736 bytes
SHA-256: 9e91c191590c82c90771b82fab701963ee0181efac2faf211c482606053061c2
font_01_sfnt_off00008af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF9 2984 bytes
SHA-256: 889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc
font_02_sfnt_off00009525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9525 18900 bytes
SHA-256: 1363cc56ee4c15ee03f400df8f5643367f19dd507976825a2be4617cdbea9f06

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