Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ac1c1586478097…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 12:00:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9df3d6c0bec5764321c786f79705ea86 SHA-1: e1d649d55d56ea1087ed7d7790dff0c16c95a49c SHA-256: c4ac1c15864780978c2bfe223f0388dbb126089c9aea3c915f1451f270563f1e
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' for popular games. The primary lure URL is http://netcdn.tw/app/431946152/aimbot-hack-roblox-rb-world-2-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into downloading potentially harmful content. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or malware distribution attempt.

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.tw/app/431946152/aimbot-hack-roblox-rb-world-2-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/dife-ml-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-roblox-apocalypse-rising-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-outfit-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-exploit-dll_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-free-robux-and-tix_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-hack-download-no-survey_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/download-roblox-paintball-hacks_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-2021-july_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-instantly-no-waiting_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/earn-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-promo-code-generator-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1D 22128 bytes
SHA-256: 1a1bef8be2339346e7ac102d8f0f11d25cbde846c3d11dfb0eabf8672e68471a
font_01_sfnt_off00006035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6035 19448 bytes
SHA-256: bc6491ae5595593ba5abfa8cf257dcaab2ff798c3ef18f82bb9bc62db177c6c0

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