Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a01d8fa814e2088…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 15:00:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eb1e4811f1f177c7cd54ed2f46ba6483 SHA-1: 63ec55ed3be749b81920727d0aae117cb8e56862 SHA-256: 4a01d8fa814e2088f92619df42e63679954cdf4a3e9cba34e6633b4319d5d9d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'generators' for popular games like Minecraft and Roblox. The primary lure URL, http://netcdn.tw/app/479516143/clients-minecraft-game-hack, is directly associated with malicious redirector infrastructure. The document body, though partially obfuscated, contains references to these lures and embedded URLs, indicating an attempt to trick users into downloading potentially harmful content.

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/479516143/clients-minecraft-game-hack In PDF document text
    • https://library.univthamrinaka.com/repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-power-hack_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-brickbattle-hack_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-robux-program_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/www-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/cheat-bar-codes-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-hack-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/como-descargar-hacks-para-roblox-prison-life-en-miedafire_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-egg-farm-simulator-comment-obtenir-des-oeufs-noirs-cheat_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/robux-hack-not-patched_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-hack-glitch-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-many-warning-for-cheating-do-you-get-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-dragon-ball-online-stats-hack_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-roblox-website_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
font_00_sfnt_off00003393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3393 22324 bytes
SHA-256: d7ffa4235b15c80696d2cbaa9177c553498454f7c7e93f37044ab5e632997ef4
font_01_sfnt_off000064f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F4 17928 bytes
SHA-256: 7e7ab3f604136df531f2e92a0bf311d09ec166787ef8857d042cbe77ee495bd4

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