Malicious PDF — malware analysis report

Static analysis result for SHA-256 99bc613fed5a0df5…

MALICIOUS

PDF

43.8 KB Created: 2021-05-16 09:34:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cbd44c7f1a4b58bde1345b8b15641c0a SHA-1: 872bc533fa97da608a6a20ca5845beca9e12be35 SHA-256: 99bc613fed5a0df52cf2212a9b3c4012342b830757d205845d8fd21b75bf1eaa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising free game hacks and currency. The primary link, https://netcdn.xyz/app/431946152/how-do-u-hack-roblox-game-hack, is presented as a lure for users seeking cheats. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to drive users to malicious content, likely a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/how-do-u-hack-roblox-game-hack In PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/robux-redeem_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/level-coin_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/robux-hack-me_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_003_off00004a8d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A8D 26864 bytes
SHA-256: 3a3c70434aeaeb79762a64fae72e5688774ccb015c9db1d9f9c90a6a3532195c
font_01_sfnt_off00008793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8793 18700 bytes
SHA-256: 24715886d6b8435fb8a33d258b866203ee2974827a311e3ab6dcb36e4a196b9f

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