Malicious PDF — malware analysis report

Static analysis result for SHA-256 84da8eba662584ab…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 21:28:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 39dd83b9b108e6148d8edb0375d4cdf3 SHA-1: 82f4dfa284e94995af997372ee5eda786771981d SHA-256: 84da8eba662584ab164f1d4b94997326ea850220700b65b4ad7b2e578e72cc4d
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/431946152/roblox-hack-2021-game-hack. The document body and heuristic firings indicate a lure for game hacks and free generators, likely intended to lead users to malicious content or downloads. No scripts were extracted, but the embedded URLs and redirector activity suggest a phishing or malware distribution attempt.

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-hack-2021-game-hack In PDF document text
    • http://empresa-venta.hr/files/report-abuse-robox-paist-bin-free-robux-code_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/descargar-hack-de-roblox-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-roblox-hair-for-avatar_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/como-robar-cualquier-cuenta-de-roblox-hack_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-roblox-soldier-gfx-ww2-german_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-cheats_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-new-account-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
font_00_sfnt_off00002d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D62 22576 bytes
SHA-256: f6170c92d9ea0b5d18d27b3d94eca7e70987621d148c22b170895073148816d1
font_01_sfnt_off00005fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD3 19056 bytes
SHA-256: 98be41374c31724b7a878275a9dc475d7e9908887f4f5935c763b7161266aa61

Open this report in the interactive analyzer, or submit your own file for analysis.