Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a9d0933137aa67…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 20:24:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 55b8f8d6bc590665c6e760ac85db6769 SHA-1: 0f1e7cfadcd55f2734bf61d5aee50afb48267782 SHA-256: b7a9d0933137aa6757473c43086af07e6bcc1ae3a03b744a13aa8e1ac054e73a
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spin-today-game-hack PDF link annotation
    • http://stimaimmi.ac.id/perpustakaan/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/code-robux-free_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-gun-sceipt-hack_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-roblox-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-robux-no-downloads-or-human-verafcation_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-hack-apk-android_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_002_off00003305.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3305 23168 bytes
SHA-256: 17743415d31e05c9a3996901700d355d211d8edd3e7e989f0b83776f820ba0ec
font_01_sfnt_off00006747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6747 18528 bytes
SHA-256: 611292c7b78d9aef83f236a5f61e8588922333099173db31565d3b831f2ee55a

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