Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d223c688ade2643…

MALICIOUS

PDF

45.5 KB Created: 2021-05-14 05:32:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a248c385aac08e7a03e54f00c445cb09 SHA-1: 923d29880e1c267b9152da04109bb4b02e35b37f SHA-256: 3d223c688ade26433363683b3ce8afdc3aedffb9185c029f4cf5b306ef58a1d6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that offer game hacks and free in-game currency, such as 'Coin Master' and 'Robux'. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The presence of a visual download button further supports the lure. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/coin-master-rewards-game-hack In PDF document text
    • http://solidcommunication.ch/images/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/robux-cheat_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-roebucks_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/collect-robux_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000487e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487E 27524 bytes
SHA-256: 74eec5a53f4ea7e94cd3816baaba96f96571447e93243a9ae20609709b78b9d6
font_01_sfnt_off00008691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8691 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off0000907b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x907B 17884 bytes
SHA-256: acbd2960432ed6aaee9cffad063da1b3d43b5b4e200ce15de4e80cb136e5b59b

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