Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef41fdd50b17e798…

MALICIOUS

PDF

35.9 KB Created: 2021-07-07 06:06:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8c9f15637ffa4b341e959b82cf4f577e SHA-1: aa1de3bcaea5f753f1d4745a3196f83316f6464d SHA-256: ef41fdd50b17e798c8f172b9e265c3e15a64f06cc84b40f0c77978ae0aef509c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high-severity heuristic firing for a 'GAME_HACK_REDIRECT_LURE' pointing to a URL associated with free generators and game hacks. The document body and embedded URLs reinforce this theme, suggesting the primary goal is to trick users into visiting a malicious site. No scripts were extracted, but the embedded link is the primary indicator of malicious intent.

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/freespincoin-masterlinkdownload-game-hack PDF link annotation
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/exploit-roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/free-robux-generator-that-really-works-that-works-right-away_GM431946152.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/roblox-hack-fame-simulator-explication_GM431946152.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/free-robux-ios_GM431946152.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/hacking-station-roblox_GM431946152.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/facebook-coin-master_GM406889139.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://www.payaljewelleryfiji.com/uploaded_files/userfiles/files/how-to-get-free-accessories-on-roblox-2021_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
font_00_sfnt_off000034ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34CE 22908 bytes
SHA-256: c475e2331f2017a6bd4e73ce0e469bced4bc00010acea39fc94eebf5ffad7f3e
font_01_sfnt_off00006849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6849 18756 bytes
SHA-256: 91b8bcfb89e937aef1780bb8b0fda0e66fb6358b78b968caff2ec433e56f47be

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