Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb84bda255eca7f…

MALICIOUS

PDF

40.8 KB Created: 2021-05-12 23:04:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: daebdbea4e62ad3c3662590aa119bf26 SHA-1: 37152c2c4413a943df850ccec5e0c973a8527394 SHA-256: 1bb84bda255eca7f6258c99dcf15eec0704c05b14bafe19e30c47245216cac65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free generators. The ML classifier also flagged this PDF as malicious with high confidence. The presence of embedded URLs and the nature of the lures suggest an attempt to trick users into visiting potentially harmful sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/hacker-coin-master-game-hack In PDF document text
    • http://www.maakherumusic.net/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.maakherumusic.net/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://www.maakherumusic.net/images/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.maakherumusic.net/images/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://www.maakherumusic.net/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/get-robux-now_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.maakherumusic.net/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.maakherumusic.net/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.maakherumusic.net/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/aternos-free-minecraft-server_GM479516143.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_off000048cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48CB 24008 bytes
SHA-256: dbee538f8ec439bcb8039e0564c04e262c5fb555700d0df60974bd9c0733453d
font_01_sfnt_off00007e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E88 17716 bytes
SHA-256: b7a59136220e75e7377c9f6e3a7c38a497a32d42f46ea76588eb807573971af5

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