Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf7be97845eee85…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 18:11:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2cf7d54013ef944eda15c6bfcd45d825 SHA-1: bb94db5123754d79b6cecc1600d6b34da0440fde SHA-256: 3bf7be97845eee85745ddb18afc0220e4095239e1403aa516111f850aaf27e74
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.tw/app/431946152/roblox-play-as-guest-free-game-hack PDF link annotation
    • http://librarysenior.com/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-redwood-prison-hacks_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-do-i-hack-robux-by-myself_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-cheat-engine-jailbreak_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-upload-roblox-audio-for-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/tiktok-free-hearts_GM835599320.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/descargar-hack-de-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-minecraft-codes_GM479516143.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_off00003078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3078 21348 bytes
SHA-256: dd056062a51a51580495702f2cf3a0c700ffc9b0a02fdd9f7d232854e75eb074
font_01_sfnt_off00005f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 19228 bytes
SHA-256: f182d4e7245a356d52ce44b407901f976493b24ead77f7030579fea83c11a077

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