Malicious PDF — malware analysis report

Static analysis result for SHA-256 d787cd09876fc4cf…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 13:32:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ddda0ce52aac8c1b13d6548989707454 SHA-1: 674f9c04790ad26fe24f8ea0f92b0f7ed70d79ce SHA-256: d787cd09876fc4cf48028b8747d2c23a8474b31faa53ceffb16bc5e299513592
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.tw/app/479516143/minecraft-free-android-game-hack PDF link annotation
    • http://librarysenior.com/repository/hack-sever-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/protomaster-roblox-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/pubg-uc-low-price_GM1330123889.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-games-at-roblox-download_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/hack-account-roblox-with-link_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_off00003132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3132 21908 bytes
SHA-256: a35a09a258ad197b05c8196a332cb5c5b61d644b2cdf5220c61cbff9e086794c
font_01_sfnt_off00006138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6138 18172 bytes
SHA-256: 76a46b6ffa672d4629705b025ed1d2900a12de91bcde6df1b9c7209dc48d6afd

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