Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e84f8369592399…

MALICIOUS

PDF

43.3 KB Created: 2021-05-11 23:41:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 76e5749a5b23e807876166a62699156f SHA-1: 812dfce51d48bb949be0bc7ee0bfb53579f2d573 SHA-256: e7e84f8369592399a0b3ca3d4300888939a9e9887dc15ca7b149b10b21169992
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting "Coin Master Free Spins and Coins" lures. The document body and heuristics indicate a fake CAPTCHA or human verification prompt is used to trick users into interacting with these malicious links. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-free-spins-and-coins-link-haktuts-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-free-spins-and-coins-link-haktuts-game-hack In PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/roblox-pics_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_off00004bf2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF2 25292 bytes
SHA-256: fc7a9bd4e3d9e4d32d67bd6c69c74a17f55c590078fc14a14f533d0ea5b90cc0
font_01_sfnt_off00008690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8690 18372 bytes
SHA-256: d0160522c9507928c114f36e82183f3878c9bb5f52b4c502e96d0270f56f9c5a

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