Malicious PDF — malware analysis report

Static analysis result for SHA-256 724396eb0ceaf1cf…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 23:35:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 30f0fc36013c169b855acba886a444a8 SHA-1: adf034bd0f24ec8f489f93ef3aff9b1a7f446b1c SHA-256: 724396eb0ceaf1cf860c771d0cd366461fb843c925e47ee20d82ffe7432385eb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising free game hacks and in-game currency. The primary lure URL is http://netcdn.tw/app/431946152/funny-roblox-avtar-free-game-hack. While no scripts were explicitly extracted, the presence of numerous embedded URLs and the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic strongly suggest a phishing or malware distribution workflow initiated by user interaction with these links.

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/funny-roblox-avtar-free-game-hack In PDF document text
    • https://new-era.com.tw/image/data/files/getrobux-info_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-hack-trolling-download_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-become-admin-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/como-conseguir-robux-gratis-hack-2021_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-bandit_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-roblox-gift-card-codes-2021-august_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-assassin-roblox-coins_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-source_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-2021-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00003074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3074 22084 bytes
SHA-256: 054546bc8ac74ba32e5691b610f64d1b84b6bd4fbc351acd0271762acf9b3c01
font_01_sfnt_off0000618a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618A 19000 bytes
SHA-256: 884f2edf226fdf7147c013af07e219e30aae42e09d28f1332e6e85079531cb5c

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