Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea9ca2338e7b85a…

MALICIOUS

PDF

36.0 KB Created: 2021-07-06 11:59:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c3695296830f84f9a5396b5905c3601f SHA-1: a98ff490a2d382219cd53ccd25591c6ec2a25d24 SHA-256: 0ea9ca2338e7b85af69660f2e8eebd4b75c8f61774f02d051d5e04ceecf61bc7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to "game hack" or "free rewards" lures, indicating a social engineering attempt to trick users into visiting malicious sites. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-rewards-link-game-hack, is directly associated with a game hack lure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for JavaScript execution or redirection to a malicious payload. The ML classifier also strongly flagged this PDF as malicious.

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-free-rewards-link-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free4mobile-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-l-robux-2021-obby_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-robux-inspect-element-no-wait_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-generator-that-works_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-dangongusee-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/games-that-give-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-hack-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/can-you-be-hacked-by-an-id-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-cb-ro-hack-script_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-your-hacked-roblox-account-back-without-email_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-robux-without-using-money_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-robux-by-joining-group-no-buying_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_off000035c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35C6 22984 bytes
SHA-256: 205a1892ee576ee7d8885a618f702b907790cf3ebdd39feb1418855eec8b5690
font_01_sfnt_off00006979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6979 18508 bytes
SHA-256: 14f3d66ef4155d674bf5c841ced46b6496567c39ab5cc62ee63c8c990417a04c

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