Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8da001663f45fec…

MALICIOUS

PDF

34.5 KB Created: 2021-07-08 15:36:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 31b6f9480fa3234c9e991d2541f268f1 SHA-1: e92803cea744e9eda0cc2dc23ad221aa59f76527 SHA-256: b8da001663f45fec873e352ca738bbc96698d61cc753999f894e3c2a63852513
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links pointing to known malicious redirector infrastructure, specifically advertising 'Roblox Money Hack' and similar game-related cheats. The document body also contains a call to action to 'CLICK HERE TO ACCES' which, combined with the heuristics, indicates a lure to a malicious site. 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 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/roblox-money-hack-game-hack In PDF document text
    • https://www.jjpremiers.com/files/is-it-illegal-to-hack-in-roblox-against-a-streamer_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-bighead-hack_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/tp-hack-roblox_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-weird_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/not-a-scamhow-to-get-free-1k-robux_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/rbx-exchange-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • https://www.jjpremiers.com/files/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/hack-money-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/hack-roblox-robux-jailbreak_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-free-ps3-download_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/medieval-warfare-roblox-cheats_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
font_00_sfnt_off00002fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA8 22488 bytes
SHA-256: 5681bc6f0b536c66d942453cfedeba574ca50c3ba37fd00ef8b1d7524bb8a0e9
font_01_sfnt_off000061e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E5 19032 bytes
SHA-256: 203e1121f486a9f27f7b8b1bc344d44945bd10d034850d35ac5f84883fff97b4

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