Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63535e0c2b58ef2…

MALICIOUS

PDF

35.9 KB Created: 2021-07-06 20:41:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fe50df11c89de7261e3af34728e49c89 SHA-1: c8b5c7e7069decd4fb89d8eca40c615167e744c3 SHA-256: b63535e0c2b58ef2ba9b68852873fc63cb561af7cc24c39d7ca3d4309c92aed4
160 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised as a game hack generator. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the lure of free game content suggest a phishing or social engineering attack aimed at redirecting users to a malicious site, likely to download further malware or exploit vulnerabilities.

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/free-bedrock-minecraft-game-hack In PDF document text
    • https://smark.com.tw/image/data/files/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-model-death-star-map-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-promo-codes-2021-list_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/batu-kolukfaki-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-music-hack_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/anime-cross-roblox-hack_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/robux-download_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-hack-arsenal-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-cheat-codes-for-coin-master_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_off00003469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3469 23204 bytes
SHA-256: abe67660dc008b7f0d6f7c9b3fc935e50c32c103fdc5511ffcd76616f05664ef
font_01_sfnt_off000068e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E2 18560 bytes
SHA-256: f19a021a5d941007fe09e9c971895504ffbc3319a114e02b8297ae24bc05196b

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