Malicious PDF — malware analysis report

Static analysis result for SHA-256 df24cb8e2bfefac2…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 01:21:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f24bb12314852fd919421f90b4a2d0fc SHA-1: 0adaaf48b732c16c9615d8e2f686c9f498e43aec SHA-256: df24cb8e2bfefac207a82881e00ff19afa2329438947a0b16bf76806fd65220d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of free Robux and game hacks. The document body explicitly contains the URL http://netcdn.tw/app/431946152/free-robux-gift-card-generator-game-hack, which is flagged as a malicious redirector. The presence of numerous similar URLs suggests a phishing or scam campaign aimed at tricking users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-gift-card-generator-game-hack In PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-roblox-promo-code-for-make-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-robux-png_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/play-roblox-fortnite-for-free_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/how-to-cheat-in-roblox-jailbreak-fast-run_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-robux-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-monster_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/hacks-para-roblox_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_002_off00002e75.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E75 22648 bytes
SHA-256: 315d9b7fcd20270cf6575cc50439996f24b674798b523300c6aaf3534b4a2847
font_01_sfnt_off00006148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 19112 bytes
SHA-256: da31b86bd70513bc950f6f3ebef22a0e782d6f2bb4858530ba27cd7b56ad3104

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