Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ccf010b5490ede…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 07:08:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b4ebada8d70484692ccd062d0c08a93c SHA-1: f836decb5d5ad0584be10c6218a5a5c8c5bff1d1 SHA-256: 29ccf010b5490ede339383ad78c0d52fd609fb57e2d1d4fba1dcd7209cb5ff97
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9865

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/431946152/how-to-earn-robux-game-hack PDF link annotation
    • http://librarysenior.com/repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-robux-on-mobile_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
stream_004_off00005354.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5354 25060 bytes
SHA-256: b3248406325610448e048cc3a955ae16d02e170c85055b23483b5e9c49810299
font_01_sfnt_off00008d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D57 18244 bytes
SHA-256: e59d0dbfa916da45dc1e57bbb1674eee7460563807a8b8eb6343b67328d59b2b

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