Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c884dd0079cecd0…

MALICIOUS

PDF

34.6 KB Created: 2021-06-30 23:07:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3255455373e9e46f895cb3ed20e01062 SHA-1: a624022fcb0f1c040e22f24e2d73467fff2721dc SHA-256: 7c884dd0079cecd00eac684a4785d40bf45a6c498517bba29d5557abfe56aa63
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to the URL http://netcdn.co/app/431946152/free-robux-in-a-second-game-hack. This URL is likely part of a phishing or malware distribution scheme. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-in-a-second-game-hack PDF link annotation
    • https://opac.itp.ac.id/repository/op-rewards-robux-hack_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/military-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-stuff-on-roblox-high-school_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-good-roblox-exploit_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/is-it-illegal-to-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-robux-with-ads_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-robux-without-human-verification-on-pc_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/games-like-roblox-and-minecraft-but-free_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-how-to-get-free-clothes-2021-nbc_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-obby-gives-you-free-robux-july-no-password-2021_GM431946152.pdfIn PDF document text
    • 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_off00003021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3021 22532 bytes
SHA-256: ebd510e8ed0bf54d0e204c6ac1b9f8733b7b5a5ef3e6684f0b22c3c9fbf6ea3e
font_01_sfnt_off00006281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6281 18888 bytes
SHA-256: cfe2df80e808671b39da46397931cbf8f46b9dbb9e3cdbefc59961871a7a64c3

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