Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea85bd179abcb95…

MALICIOUS

PDF

41.7 KB Created: 2021-05-19 00:18:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cbbdfc5ef5a6905fc7689d98e12a92cb SHA-1: 515580f18fb8b6afaf5eaeefa96e1113aefa2c36 SHA-256: cea85bd179abcb952be2f9aa0791b381364026212bf9ed37fd81813dac061e4a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/free-coin-master-spin-app-game-hack PDF link annotation
    • https://javexglobal.com/image/data/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-free-coins_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_off00004894.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4894 24940 bytes
SHA-256: b87ff2229b73a7045a8f77c6fff932c94bd592d93087435a3f04bcfb1e0d84c2
font_01_sfnt_off000081f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F4 17884 bytes
SHA-256: 6a5fc0e5ee3990f98fff047e5d02c1443490e61ce795861dff478bab25fb071a

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