Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba41909bccd11927…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 12:34:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 20b4fc4fc1a1e7bfbdbb980a2722e5d0 SHA-1: 1c9ad0b229f6ac6cf7ab3f268c63ced45ec33a8b SHA-256: ba41909bccd119272fcdea1de485784ac789dcb2df4c38f0fb6c758cd77edc27
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to websites offering game hacks and cheats, such as 'minecraft-coins-free-game-hack'. This strongly suggests a social engineering lure designed to trick users into visiting potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

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/479516143/minecraft-coins-free-game-hack PDF link annotation
    • http://libnh.stikesnh.ac.id/repository/robux-no-survey_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/robux-only_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/counter-blox-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-hack-roblox-all-games-android_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/spin-coin_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-minecraft-dungeons-for-free_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
font_00_sfnt_off0000337b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x337B 22672 bytes
SHA-256: fd6cfac3458930e343d07080a3e5f1df59e261bb08bb18924d9e4bebc14eea92
font_01_sfnt_off00006624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6624 17996 bytes
SHA-256: 57addac7b62f6982da03a34d469d6734b49e3a67e494fbb995a28ec062f8da05

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