Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c5a616f33cdfff…

MALICIOUS

PDF

44.1 KB Created: 2021-05-14 06:07:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 19e7e67c5b4c0e07856f7d6d9b631590 SHA-1: c564856c5d08487d7e4b4e9b2f057866f0cdc431 SHA-256: c8c5a616f33cdfffd02a6d0e24a75d23fa72a3bc1cb8eb59b14233f5ab4ac161
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector domains, including one specifically identified as a 'free generator / game hack' lure. The document body and embedded links suggest a social engineering attempt to trick the user into visiting malicious websites, likely to download further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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-100-spin-slot-game-hack In PDF document text
    • https://ethraa-sys.com/userfiles/files/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/robux-offers_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-robux-no-downloading-apps_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_003_off00004863.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4863 30852 bytes
SHA-256: 790334dd75639cb194bcef9a682112de69e094a7bb682f358b44a214559fa468
font_01_sfnt_off00008ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD3 18072 bytes
SHA-256: e186f2c49e0e53813a98f8c0f9ecdb2b905b101c49c302baec32f8d5c8ad9fd8

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