Malicious PDF — malware analysis report

Static analysis result for SHA-256 99add5c29e81d06a…

MALICIOUS

PDF

43.0 KB Created: 2021-05-15 11:18:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ac93bd38771bb83fcf4923e2e3e3e329 SHA-1: c8b8b7a56dcc25011357d2665af047330ce5388f SHA-256: 99add5c29e81d06ac1f793e20c8bcc4b35f31f61f7b9a352ecbf7f206a7bf2c1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to a malicious redirector infrastructure, specifically promoting game hacks and generators. The document body, though partially corrupted, contains references to 'Coin Master Game Hack App Download' and a URL associated with this lure. The presence of multiple malicious links and the ML classifier's high confidence score indicate a high likelihood of this document being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-hack-app-download-game-hack In 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-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAD 25460 bytes
SHA-256: 1bb8ce3b418c0032bb8423f5d2c36de45a23b329c727675001c07fc3ee475235
font_01_sfnt_off00008480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8480 18732 bytes
SHA-256: f404071305b689e90b7e8211e9e9c7c0bd06c22f48a22ec113b2942a02d780a2

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