Malicious PDF — malware analysis report

Static analysis result for SHA-256 697c1fbaf8af5dcd…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 09:27:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a2e47aa58a18edb4cde2466de274d02a SHA-1: 6aebf58820e940db0ee7b75aa1e8b08aaaf18288 SHA-256: 697c1fbaf8af5dcdf8a64a94e15af1cd91ad5f984a7c1b0676a6b53f2b8a8858
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a 'free generator / game hack' lure. The document body and numerous extracted URLs reinforce this theme, advertising various game-related cheats and hacks. The primary malicious URL, http://netcdn.tw/app/479516143/minecraft-for-chromebook-free-game-hack, is identified as a known malicious redirector, indicating the likely intent to lead users to a malicious site for further exploitation or malware delivery.

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/minecraft-for-chromebook-free-game-hack In PDF document text
    • https://foc.vn/public/upload/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-robux-2021-xbox-one_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/youtube-free-robux-obby_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-hack-validation-code_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/cheat-rpg-world-roblox-script_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-hack-robux-on-pc-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/synapse-hack-roblox-anti-ban_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/robux-page_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-account-taker_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-hack-roblox-with-roblox-plus_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_off00003553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3553 22576 bytes
SHA-256: 24aa0c41bed7026d7261f0c800bf6dd823efa195318fd71976a3afa54aa73d84
font_01_sfnt_off0000678e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678E 18752 bytes
SHA-256: 616ab3f700462aed481386b22979965c6dca6356bf91b8a6a5de3323c758484c