Malicious PDF — malware analysis report

Static analysis result for SHA-256 29af3962a5a0d423…

MALICIOUS

PDF

45.7 KB Created: 2021-06-09 14:14:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0a37a6a93be9cb75619ed63bf475b710 SHA-1: 945b3c31001eded2d6a73f4876eab6d7338619c1 SHA-256: 29af3962a5a0d423e2a7fc5b1e764e2ece9fd65ca8389a914f63454908ec50ef
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 0.9864

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.tw/app/431946152/roblox-old-version-free-download-game-hack PDF link annotation
    • http://librarysenior.com/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-insert-tool-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/trustworthy-free-roblox-lua-executor_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-spins-2021-today_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_004_off00005126.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5126 26432 bytes
SHA-256: da1ff4114523a0e3ab4a45d6ad1108e02a45d0e0f4d48f64c887a6116ddeff21
font_01_sfnt_off00008e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E35 18936 bytes
SHA-256: 8d86df67e30c1c4aaab161ef69dacc4e27b600ef5efc5c1db5cedd9fff477417

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