Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd30604633eae328…

MALICIOUS

PDF

43.7 KB Created: 2021-06-02 15:12:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: caa1ae0fe134ebb71b75945a09913b32 SHA-1: 980b2ba2a150bb37709e40e61bb26371c3c66a56 SHA-256: fd30604633eae3287c537a2955b7ecf4d1387f0f70fa9a92746ae33a407212ce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free items. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful websites for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/best-free-roblox-t-shirt-game-hack In PDF document text
    • http://kukuck.de/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-tiktok-video_GM835599320.pdfIn PDF document text
    • http://kukuck.de/images/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-spin-and-coin_GM406889139.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_off00004f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F68 24692 bytes
SHA-256: f4b0b3a5356eb277ccf3d977d2b8bc53a22bf8f2f907b32e64604aadcdd60797
font_01_sfnt_off0000883f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x883F 18340 bytes
SHA-256: abbeef54ecbc649bd594fa8ca9b24e92cca8a5fdd56318b2f7c63e1ba53d9109

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