Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66f4fba0bc6cb57…

MALICIOUS

PDF

35.5 KB Created: 2021-06-20 11:20:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6ac5f0336525f00c0b741fd2d91229be SHA-1: 7774135550d0e559ff392bce1df5435b10970092 SHA-256: d66f4fba0bc6cb5761028911a38d6df6cf69756940ec0512723bf994fa9837ed
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 0.9980

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.co/app/431946152/roblox-svg-free-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/her-roblox-acount-got-hacked_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-robux-codes-for-roux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-do-you-get-free-skins-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/robux-generator_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-million-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-cool-free-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
font_00_sfnt_off00003108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3108 23700 bytes
SHA-256: cecbd066be5d1d7e818799d4bff51b6201f12da441d1f10080ff6ad51326cdde
font_01_sfnt_off00006675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6675 18764 bytes
SHA-256: d01fb55d319379bc19fcf76ffe4a1ca74764956adac7a954ac4bfc7755e176cd

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