Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3edd40ac0ddc08…

MALICIOUS

PDF

46.9 KB Created: 2021-06-11 01:19:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 45d91abb1e276b1502355e6fbc248eb7 SHA-1: 8ce7e977b0f08a3b598fdea9ee290eccec009182 SHA-256: 2b3edd40ac0ddc0863cc24028a8450da36298d18cf9a7bdd11f751f04504b3f1
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 0.9769

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-quick-easy-cheat-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/roblox-blue-adidas-shirt-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/picture-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-obc-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-punch-animation-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-tips_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hacks-for-pet-simulator_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f82.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F82 25324 bytes
SHA-256: 5d966c09a796b60811f42f59d8062dcedd3dad3ede6125ba6bce410ef274a45d
font_01_sfnt_off0000878c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x878C 3032 bytes
SHA-256: eb2d8a764385a4044f858a7f5e70d59b449d98073ad28e27db9341a8e24a54f3
font_02_sfnt_off0000920f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x920F 19052 bytes
SHA-256: bb5a1c69c0658c0e9d8a1ff6ef036d800686e9c10e3c3afc6475c00c64cfafb7

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