Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c8a38541b8253a1…

MALICIOUS

PDF

34.0 KB Created: 2021-06-18 09:29:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: abfa54f95b37a9cbc4d5cfebc476a4f9 SHA-1: a5c25c9bf25338100faf195979b3f719c0c5fff6 SHA-256: 9c8a38541b8253a1e3e5b2157935a107fd6e7533fbe9d2393c50534b671497e0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a "free generator / game hack" which links to known malicious redirector infrastructure. The document body explicitly contains the URL http://netcdn.co/app/431946152/game-that-accually-gives-free-robux-game-hack, which is presented as a call to action. This indicates a phishing or scam attempt designed to lead users to potentially harmful websites.

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/game-that-accually-gives-free-robux-game-hack In PDF document text
    • http://kukuck.de/images/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/roblox-hack-club_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/roblox-da-hood-hack-or-glicht_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-robux-for-free-hacking_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-credit-card-numbers-for-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-pin-codes_GM431946152.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/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-badges-roblox-game_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-hack-2021-android_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_off00002d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D16 22364 bytes
SHA-256: af360a854f4f07407defcf8d37f61cd3a320e4070e9532ea30b354cf735ff39d
font_01_sfnt_off00005e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E87 19548 bytes
SHA-256: 706e6d48dba2f23817c7e53fd8acd81ae1d191d6e52017935ebb6b7514223a39

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