Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a24e9c422f09cf…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 23:55:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 663b99205bd68a5c085bb1813ca56c45 SHA-1: 99a1519e61fd2c69718d53cb7a87e2c25a7ac4ea SHA-256: 56a24e9c422f09cf0f7cbaf470614dc8a362f3160527526e0a3f209262e050ee
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.online/app/406889139/free-coin-master-hacks-no-verification-or-survey-game-hack PDF link annotation
    • http://librarysenior.com/repository/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/tiktok-free-hearts_GM835599320.pdfIn PDF document text
    • http://librarysenior.com/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/tiktok-free-8-ball-pool_GM835599320.pdfIn PDF document text
    • http://librarysenior.com//repository/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/robuxy-com-generator_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_off00004f4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F4C 27356 bytes
SHA-256: f6f08c29f34332ddc5d8dbc351f591e8803fb651d333ac7ef9798dfa2e582234
font_01_sfnt_off00008e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6F 18448 bytes
SHA-256: 6033c807022dc8f5e7c2550342d577dba769a4341b0264654ce29c91acd4bdf4

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