Malicious PDF — malware analysis report

Static analysis result for SHA-256 394b7290ca8fbef1…

MALICIOUS

PDF

34.2 KB Created: 2021-06-28 05:50:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6508341845296c54348dbd23579f0b10 SHA-1: b60fb5da97f0792a480d23bc2d3d4aea9f19a3e8 SHA-256: 394b7290ca8fbef1898a4b7fdefb8b3c9f268f071c645147575b36499829bc4f
160 Risk Score

Malware Insights

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

The PDF contains multiple links to malicious redirectors, specifically advertising 'game hacks' and 'free generators' for popular games like Roblox and Coin Master. The primary malicious URL identified is http://netcdn.co/app/431946152/hacked-by-roblox-id-music-game-hack, which is flagged as a known malicious redirector. The document body, though partially corrupted, contains references to these lures and the malicious URL, indicating an attempt to trick users into downloading potentially harmful content.

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.co/app/431946152/hacked-by-roblox-id-music-game-hack In PDF document text
    • https://gryps.de/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/how-to-hack-le-bote-roblox_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/minecraft-handbook_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/how-to-hack-pubg-mobile-unlimited-uc-without-human-verification_GM1330123889.pdfIn PDF document text
    • https://gryps.de/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/how-to-get-fly-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/robux-com-free_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/bloxburg-us-free-robux_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/car-spawn-gui-roblox-free_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/robux-hacks-2021-pc_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D44 22288 bytes
SHA-256: fb5b9881668418401dd98432c7832b5d2efa13e7dbbb7ecdcf6d9c2b7b8d8832
font_01_sfnt_off00005f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 19464 bytes
SHA-256: 2cb28df1e7cba2e95089b6e9c810cfd3169ec0946a41296027e3ed39b5e79722

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