Malicious PDF — malware analysis report

Static analysis result for SHA-256 967114cd7f33639f…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 18:46:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1b620e3d6cf2d6add61ecd7168998950 SHA-1: 7f1db4396cee5750f26a6c217757ebb0ada803cc SHA-256: 967114cd7f33639ff0317b4cb72a4ff3a0c1383d48cb218548fc02576e938f75
180 Risk Score

Malware Insights

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

The PDF contains a malformed exploit stream and links to known malicious redirectors, specifically advertising free game hacks and currency. The primary lure is the URL http://netcdn.tw/app/479516143/minecraft-free-download-game-hack, which is associated with a 'free generator / game hack' redirector. This suggests the document is designed to trick users into visiting malicious sites that may lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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-free-download-game-hack In PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/how-to-get-free-robux-2021-legit-working-100_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/how-to-get-free-roblox-on-roblox_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/download-lag-free-version-of-roblox_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/paginas-roblox-free-robuxx_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/claim-robux_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/free-robux-co_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/cheat-roblox-jailbreak-2021-money_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/hacking-lessons-for-roblox_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/how-to-hack-your-robux-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/haktuts-coin-master-free-spins_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_off00003312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3312 21972 bytes
SHA-256: 23f92b920360d626fc602f04f60e21349a00ff237442a7ead0a53d4525f440ce
font_01_sfnt_off00006387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6387 18576 bytes
SHA-256: 06b239d8a28b1d5597486ea199a20c5d387b716390632991d2cfb7c0688950f5