Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e4f53839c1f1d0…

MALICIOUS

PDF

43.4 KB Created: 2021-05-16 05:02:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 72d7d3a23d7362e7afbcc5a70c90936d SHA-1: 77114ac316674a2247a8e976aa414a49f414bf28 SHA-256: a3e4f53839c1f1d0a8341cb4d3c5d12be018bd7be01a7e982462cc17bfd44251
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, disguised as lures for game hacks and generators. The primary malicious URL identified is https://netcdn.xyz/app/479516143/is-minecraft-free-on-nintendo-switch-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a workflow designed to exploit user interest in free game content, leading them to potentially malicious sites that could deliver further payloads or initiate exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/479516143/is-minecraft-free-on-nintendo-switch-game-hack In PDF document text
    • http://killebergsridsport.se/images/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/body-roblox_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-hack-into-someones-roblox-account_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
stream_003_off00004bd3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD3 25976 bytes
SHA-256: e794e0fe8a865c96b50112b97141348297d98b2d55e623ebe849825e6fac9bf9
font_01_sfnt_off00008782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8782 18212 bytes
SHA-256: 88833f0f37aaf816a00c97530fc90e87f2df28a22611e5c00792867ae98cdb6c

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