Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ec0db21c30673b…

MALICIOUS

PDF

33.8 KB Created: 2021-07-08 05:42:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c2a363d31fa895704232fabbbf7cd1e8 SHA-1: 1f786e106bfce693be7ddd96026e827e7c063875 SHA-256: f8ec0db21c30673b1a168d93a6cfcbbe070160fafc2388116839feeedd343933
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free Robux hack" which links to a suspicious URL. This heuristic, combined with the ML classifier flagging the PDF as malicious, indicates a social engineering attempt to redirect users to a potentially harmful site. The document body and embedded URLs reinforce the theme of game-related scams, suggesting an attempt to trick users into downloading or visiting malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.tw/app/431946152/free-robux-hack-2021-game-hack PDF link annotation
    • http://library.smpn2-byl.sch.id/repository/roblox-free-robux-2021-pastebin_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-robux-without-verifacation_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/roblox-money-cheat-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/robux-free-no-vertifacation_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/in-roblox-how-to-get-free-robux_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_off00002a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4C 23368 bytes
SHA-256: bd4af07c4d69ede86151edd98aff58b1ee942e5b951a72498923fed97930dab3
font_01_sfnt_off00005e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E79 19288 bytes
SHA-256: f0e75447e64b5aff6e0a409bd439ae7070421d1013f4950abf0614a44f9f6dfe

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