Malicious PDF — malware analysis report

Static analysis result for SHA-256 11923a47faaf92f1…

MALICIOUS

PDF

36.4 KB Created: 2021-07-07 09:54:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ebc9f6f3740a385c13feb26f9b8c278b SHA-1: f07edcf5e4e8daae4388151bd7b4082f58584341 SHA-256: 11923a47faaf92f165dcc3e7e3b13f4ed5375efa996ec7165edd9381d457ff1d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that explicitly advertises 'free spins and coins' for games like Coin Master and Roblox hacks. The heuristic firings confirm these are lures pointing to external sites, likely for scamming or malware distribution. No scripts were extracted, but the overall pattern suggests a phishing or social engineering attack aimed at tricking users into visiting malicious URLs.

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-daily-free-spins-and-coins-links-game-hack PDF link annotation
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/robux-hack-app-download_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-ful-colour-brown-pant-roblox_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/apple-hack-online-roblox_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-robux-2021-april_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/weird-roblox_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-new-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-hack-no-scam_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/yt-how-download-script-hack-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-google-roblox-items_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_off000035cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35CF 22892 bytes
SHA-256: 2ce1cdc451fdfa273c9dfa1b7274b4a7ea75ddbeba6b1328e04554fbaf405656
font_01_sfnt_off00006959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6959 19056 bytes
SHA-256: 803b08b6f06247c41f0de4833b75fa2b1ccb1155f19f5f0c28bf2f4e3a032072

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