Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df78b0881d09e6b…

MALICIOUS

PDF

36.9 KB Created: 2021-07-05 22:22:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8efcd1bd43c00c99847237464b501965 SHA-1: 87d94101d7abcc1f711d8a349d39a3795b9c8e08 SHA-256: 6df78b0881d09e6bc8623eb0d46cbb1bee3646f383dc7f61549755ed712ab43e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external resources, including one at http://netcdn.tw/app/406889139/download-coin-master-free-spins-link-2021-today-game-hack, which is likely intended to deliver a payload. The document body and embedded URLs suggest a lure for game-related cheats or in-game currency. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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/download-coin-master-free-spins-link-2021-today-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-giveiaway_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-strucid-roblox-aimbot_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/pubg-uc-and_GM1330123889.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/2021-hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hacks-roblox-royal-jelly_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-link-no-verification-code_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
stream_002_off000034fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34FC 23376 bytes
SHA-256: 3a6089b31edd82904e397d11e8e5fcb689fb4c04836d394a527dc5fa58243e25
font_01_sfnt_off000069e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E9 19504 bytes
SHA-256: 95988c68448a1ca754540d0d2f4ef0d2771c8f39fe215f992d1da7c8ae6d62cf

Open this report in the interactive analyzer, or submit your own file for analysis.