Malicious PDF — malware analysis report

Static analysis result for SHA-256 954f481861b66867…

MALICIOUS

PDF

45.6 KB Created: 2021-05-19 18:51:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8ff1d8a94e85615423080b148e770a77 SHA-1: df9ddf176d0bbc30e54d2bd6ed9597fb7e31048c SHA-256: 954f481861b6686732c1298ca9af9deba24683c2cdc01bde8f7edec6b7ce9fae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising a "Coin Master Game Legitimate Hack". The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users to click on these links, which likely leads to the download of additional malware or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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 https://netcdn.xyz/app/406889139/coin-master-game-legitimate-hack-without-signing-up-or-shareing-game-hack In PDF document text
    • http://akvamaster.com.ua/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-much-tiktok-free-view-creator-fund_GM835599320.pdfIn PDF document text
    • http://akvamaster.com.ua/images/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://akvamaster.com.ua/images/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bcb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BCB 24652 bytes
SHA-256: 3f56b57576251c70feffa5f50cba9ca3dd4477eff400dd47713843aef26e40be
font_01_sfnt_off00008378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8378 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00008d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5E 19128 bytes
SHA-256: dc9a87bd67df9bb84126e25e8cfd6c542a2bbbef26e11d73549ffc23dff564de

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