Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c3b99d642d9eec…

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 11:05:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2aa61366a0413317f9d010d0ed77782e SHA-1: 1e652801ee95167d632a158ded64af55b96d8b63 SHA-256: e6c3b99d642d9eec3c78f99d2c463e3a84c795864e78de49d6fe2ec3b563f256
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack redirector, specifically for 'Coin Master'. The document body and extracted URLs reinforce this, pointing to sites offering game cheats and free spins. This pattern suggests a lure to download malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/coin-master-heaven-free-spins-today-game-hack PDF link annotation
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/coinmaster-hack_GM406889139.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/roblox-hack-accounts-password-2021_GM431946152.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/free-250-robux_GM431946152.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/roblox-beetle-hack_GM431946152.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/roblox-admin-hack-tool_GM431946152.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/robux-hacks-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/how-to-get-free-robux-easy-without-human-verification_GM431946152.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/hacks-to-steal-robux-sign-up_GM431946152.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://hunting.beta.privatewaterfishing.com/userFiles/files/www-roblox-com-robux-free_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_002_off00003452.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3452 23104 bytes
SHA-256: fb4f32ef4f9d2ad3282d4f79fa051dd5942e92e046d35e2b9895b7327e436b39
font_01_sfnt_off0000686a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686A 18640 bytes
SHA-256: 3d9153b17c01349321dbf9895197e00a389ef43fe3f4ac06fe2a253dcac379fc

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