Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef7f4379455f919…

MALICIOUS

PDF

40.4 KB Created: 2021-05-14 09:01:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f4ed83f43fcf8db8eb72a8f751b350a0 SHA-1: 92bb40c05414995f5a7da0d691be431438375075 SHA-256: 4ef7f4379455f919d47099d268f32aae67946a29d4358c25cef96458f46e3fd8
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a fake CAPTCHA lure to trick users into clicking a link. The link redirects to a game hack generator website, likely as a pretext to download further malicious content or to phish for credentials. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple game hack-related URLs supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • 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
  • 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 https://netcdn.xyz/app/406889139/coin-master-game-hack PDF link annotation
    • http://elib.acls-indonesia.com/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/daily-coin-master-free-spins_GM406889139.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_003_off000046f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46F4 23936 bytes
SHA-256: 35c42ef82638b7f25b65688b3c4e9ad589ef16771b3f69e8516060fd66b125a2
font_01_sfnt_off00007d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9B 17544 bytes
SHA-256: 5ee316c89f58fa7ece53e10d1822e70a80b2e7ece9f31707ca69690d36fdc75d

Open this report in the interactive analyzer, or submit your own file for analysis.