Malicious PDF — malware analysis report

Static analysis result for SHA-256 120817772a3b8aad…

MALICIOUS

PDF

35.5 KB Created: 2021-06-25 16:42:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4cb98984b80ac8ee9f415c834446109d SHA-1: 1b37d64be7d50521933bdb44680e214804619e34 SHA-256: 120817772a3b8aadf8d9aa65bd2c269756dfc450e32d3a519da3430f923efbb4
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.co/app/431946152/meme-attack-roblox-cheats-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-free-roblox-games_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/easy-way-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/steves-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/tiktok-free-robux_GM835599320.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/is-roblox-free-on-psn_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-how-to-change-name-for-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-coins_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_off0000307f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x307F 23228 bytes
SHA-256: 43af5565b90684138a8abf84d5da1f6a855b14e3f77afca37b0de13549f91573
font_01_sfnt_off000064d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D3 19384 bytes
SHA-256: 4b771da846c52368a17b3e0a27a910a15d03664d6d162798246b3619aadc814d

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