Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef37cdd751751ea…

MALICIOUS

PDF

44.7 KB Created: 2021-06-11 02:11:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6aa433dc2a70b1a9b94eda0d1510c4ef SHA-1: 1187c014078477762bc6953479723a1c1fe6d57c SHA-256: 3ef37cdd751751ea1a698d9ced13e3e067a471c4c4a5c80af8b51e0efe34c3d9
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 0.9865

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/paste-bin-dab-hack-script-roblox-game-hack PDF link annotation
    • https://library.stikeswnpalu.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-no-offers-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-game-com_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/pokemon-go-free-pokeballs-promo-code_GM1094591345.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-free-download-pc_GM479516143.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_off0000518c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x518C 25140 bytes
SHA-256: b677dd71455c4e19b748c9c005982841a4999adb938261ba97f7079dca493deb
font_01_sfnt_off00008a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5F 18904 bytes
SHA-256: e0a4991f03705cb46f4d5109008bfba60a1817ecd431535c8cf622418fcf8010

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