Malicious PDF — malware analysis report

Static analysis result for SHA-256 0018b3d899d9d5ad…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 12:14:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 116dfe4f89898c749e9dab0be6427a07 SHA-1: d2bbb9cd95adc8f6818897103373d6f67aa63932 SHA-256: 0018b3d899d9d5ad3814df58c42d01fe68014c6ff15e63dd859bfd49a9e0018c
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/free-roblox-alts-with-robux-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-xbox-packages-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-followers-on-tiktok-without-human-verification_GM835599320.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_off0000503b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x503B 27900 bytes
SHA-256: a9bc95b3f5643d2ec42bc5a2fbf80e2e1b83e692300d9a3dd7dc85be6dd56a5b
font_01_sfnt_off00008ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECF 18676 bytes
SHA-256: ca03a7ada748cd36e45830da663b67605fe4b8a766ffd84466efc2686ed5f9d1

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