Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ed966b15c3a505…

MALICIOUS

PDF

34.2 KB Created: 2021-06-30 21:36:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1f3a6ddfb1a889b51b669a02530f5ae5 SHA-1: b4eb57d11db1ed48a31ae90f37fa4bd1910d6a14 SHA-256: 55ed966b15c3a505399a85ecea869d7fe396cce3b107d2276c9a91bc5c5dd6db
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains numerous URLs and text referencing 'hack gratis robux' and similar terms, indicating a lure for users seeking game cheats. The presence of a LOLBin token sequence and an external URI heuristic firing suggests the document is designed to redirect users to potentially malicious content. While no scripts were explicitly extracted, the overall structure and content point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 http://netcdn.co/app/431946152/hack-gratis-robux-game-hack
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/free-robux-giveawaycom_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/robux-hack-without-human-verification-pc_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/roblox-adopt-me-hacks-2021_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/games-like-bloxbutg-in-roblox-for-free_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/free-admin-robux_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/pastebin-hack-robux_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/hack-app-roblox-jailbreak_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/coin-master-free-link_GM406889139.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/roblox-tix-hack-2021_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-download_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/roblox-how-to-get-free-robloxian-20_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/roblox-jailbreak-hack-mac_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/roblox-hack-jailbreak-julian-juegos_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/free-robux-no-survey_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/cmds-roblox-hack_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/roblox-bloxburg-build-hacks_GM431946152.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/free-robux-generator-robuxian_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f4e.bin
86b00edf12d8b1532c9ed490826ea9f2b3dc469a5021eb8cfe65e47dc3e477e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4E 22220 bytes
font_01_sfnt_off000060ab.bin
fca9206943ea09d67ed165e9b8fca4377586130841c29f0b521d35f41d11dcf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AB 18948 bytes

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