Malicious PDF — malware analysis report

Static analysis result for SHA-256 334145a7ef07e394…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 14:11:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 67dd80ffdccb2b79803afe4d6865175c SHA-1: 9b9a70fa8cc5b65ce49affbf99ebc28420fa31b3 SHA-256: 334145a7ef07e3941187392db8ee612daaf0c752a1ab52194a5f001c15ea8d19
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a game hack lure to entice users to click on a link. The primary heuristic, 'PDF_GAME_HACK_REDIRECT_LURE', and the embedded URL 'http://netcdn.tw/app/431946152/lvl7-roblox-hack-game-hack' strongly indicate a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence.

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/lvl7-roblox-hack-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-accounts-obc-lifetime_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-do-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-search-for-free-clothes-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-building-simulator-free-time-maschin_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hacking-incident-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-make-a-shirt-in-roblox-free-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hacks-for-roblox-backpacking-beta_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-hacks-2021-epic-minigames_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-codes-for-heavon-or-hell-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/vip-hack-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-hack-free-robux-hack-ios-android-proof_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/haktuts-coin-master-hack_GM406889139.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_off000030a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A6 22588 bytes
SHA-256: 9ab0752fdc7661886c58d76a44cd549234e4dd2d30279bc7775d3006a5b2c39b
font_01_sfnt_off0000633b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 18828 bytes
SHA-256: f8f235fdacaa8520d96ec6c30ce226ad5891f3fe8e659b3aa2f23d7dadceddd6

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