Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb229d9f32412e4…

MALICIOUS

PDF

47.3 KB Created: 2021-06-04 00:02:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 59e062f85beffb6accefab6b6cbd73d7 SHA-1: 3a84e39a2ab58c1faa90e591e3d3e15a8b4075b9 SHA-256: aeb229d9f32412e4fb0bac9f1cbbf3dd54805d2c6f14a71fa9195871bb5d2656
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to a 'free Robux' generator, identified by heuristics as a game hack lure. This link, 'https://netcdn.online/app/431946152/free-robux-app-game-hack', likely leads to a malicious website designed to trick users into downloading malware or providing personal information. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.online/app/431946152/free-robux-app-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-change-your-name-on-roblox-for-free_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
stream_004_off0000522a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522A 29128 bytes
SHA-256: 80745a945681a80c6698d3acc3d4c2378d38879f00c893ba8ad027cff7eaabcb
font_01_sfnt_off000096ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96EC 18192 bytes
SHA-256: b6ab7ec8c8ad827553cf0587115e299062cd48018093aec7e14a56fabc9ede42

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