Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b84146b25c2eb1e…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 18:12:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 98aa8c1e880f391eac68a7fb5e2e3473 SHA-1: 2b5eb9e1c26f4fa8bd26f0bf167ff20f02dc7a09 SHA-256: 2b84146b25c2eb1e95ececd0a961a2a381fcc0024a76cf7e59cba7d077b1ad96
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to game hacks and free generators, specifically mentioning Minecraft and Roblox. The primary URL, http://netcdn.tw/app/479516143/bad-minecraft-free-game-hack, is flagged as malicious and likely leads to a malware download or phishing page. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or malware distribution attempt.

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/479516143/bad-minecraft-free-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/roblox-free-robux-online-no-survey_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hack-roblox-vip-servers-flee-the-facility_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hack-para-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-code-carte-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/v3rmillion-roblox-cheat-engine-bypass_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-if-your-a-kid_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-speed-hack-in-roblox-jailbreak-on-ipad_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/aimbot-hack-roblox-murder-mystery-2_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/money-hack-in-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-account-free-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/get-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/rbxcity-free-robux-instant-pay_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-tuts_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_off0000354e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x354E 23028 bytes
SHA-256: e597f5f4e3e668536dba943e69c8c0d2802ffe4f4f0a5c5213f6822e12a26468
font_01_sfnt_off000068a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A6 18248 bytes
SHA-256: 4aba1dd6cc01965d6b6215da11c039b33948f2b192d52beaea5b71c00603ea7c

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