Malicious PDF — malware analysis report

Static analysis result for SHA-256 1522c6f6e7ebd50a…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 06:51:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 38b888497a5d98421d4de82cca8e433d SHA-1: e3d7a0f4d8ab3b5fc2c0ab383114d75a1224011a SHA-256: 1522c6f6e7ebd50a5bbcf4960df2efcf3e31b76c39ab2625e7dbfe868c2219c9
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/coin-master-free-spins-and-coins-2021-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-tiktok-followers-royal-key_GM835599320.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-coins-no-human-verification_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_off0000530f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x530F 25876 bytes
SHA-256: bff28ef1778e2bd7f8dd3d72fce86b33f7ede9767173b06c7d6a70add51efd6e
font_01_sfnt_off00008ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DED 18460 bytes
SHA-256: c259e1f543e24e5bfe6ce8cf601a342cc00786119f62dbfadbed712250492c46

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