Malicious PDF — malware analysis report

Static analysis result for SHA-256 00831a6d0f0a65c2…

MALICIOUS

PDF

49.7 KB Created: 2021-06-11 06:10:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0d23ac2f2a8f03d63f81f4f9489a8021 SHA-1: c81e5063e4b4deef9d1bf426dd73765152c07f11 SHA-256: 00831a6d0f0a65c2c576be6d98270dcc2cf1fdd261297b3dbf370705929b6af9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector infrastructure, masquerading as 'game hacks' or 'free generators' to lure users into downloading malicious content. The primary redirector URL is https://netcdn.tw/app/431946152/floating-hack-in-roblox-star-wars-first-order-game-hack. The document's structure and embedded links suggest an attempt to trick users into executing further malicious code, likely through a downloaded payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/floating-hack-in-roblox-star-wars-first-order-game-hack In PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-hack-someone-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/is-pokemon-go-free-on-nintendo-switch_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/moon-active_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-spins-2021-apk_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_off0000529d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x529D 28200 bytes
SHA-256: f727f35b66fcc995daae5c62e5959ef7739c9e7d44f5e4767f7df2d72e545509
font_01_sfnt_off000092ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92AD 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C98 19232 bytes
SHA-256: cf377c1e4b35d1e5c70e343d47a668d3f57d8d3d8c110dd1da502410e811ada7

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