Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3fc3e92678258a6…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 20:23:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d28462fe94e71eeebe4275a9ba608cef SHA-1: 1f29adb5278a26ec9e7095a00d89c756ba02715c SHA-256: e3fc3e92678258a618290e8a42ada341bd94d0638bcbbf192a65adda2e3fed73
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document body and extracted URLs indicate a lure for free Robux or game hacks, a common social engineering tactic. The presence of embedded URLs and the ML classifier firing strongly suggest malicious intent. The document likely serves as a dropper or redirector to a malicious payload, potentially hosted at the provided URLs.

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/free-robux-without-any-human-verification-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pubg-uc-20219_GM1330123889.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/fre-robuxe_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/cmds-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-bobux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.orIn macro / runtime command snippet
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED0 22492 bytes
SHA-256: 15cea4799fd94b2ff873be2eb8db36f05c03fa43048b0d82c6255a9c7ed561ba
font_01_sfnt_off0000612c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612C 19876 bytes
SHA-256: 5a48ae2eb70649db8561b91a21f4a1a03a7e4cea76a1a3abc054459f396a73c2

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