Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fccbae79776e71…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 09:23:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 567257e83c2b9ce351227935d2cdb9d7 SHA-1: 952e9a9de3cd1f4771afaf60472a5f159ef8111d SHA-256: 67fccbae79776e71167e4c2b32d74fb0e9456aa547b19f00ab5ee54b0817b7fd
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary link, http://netcdn.tw/app/406889139/coin-master-hacks-free-spins-game-hack, is identified as a malicious redirector. The document's content and embedded links strongly suggest a social engineering tactic to trick users into visiting malicious sites, likely for malware distribution or phishing.

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/406889139/coin-master-hacks-free-spins-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/lockview-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-two-player-military-simulator-tycoon-money-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/sulavan-hacked-my-acount-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheat-engine-63-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-roblox-hack-no-survey-no-human-verification-update_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-login-and-password_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/dragon-ball-advanced-battle-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-avatar-girl_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
stream_002_off000030a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30A1 23008 bytes
SHA-256: 6c6ccab8596d4fe2b69104f1afc66fd5139d6201ae16cc5d08ccd31d17f5fedc
font_01_sfnt_off00006413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6413 18344 bytes
SHA-256: 947667c85d24b0d3a8de245f111eeade861a88a333665e7462fd4878b305e25b

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