Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9c106bd6e606b6…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 14:04:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 16c47d35b7472c56949af041ccb9e2a0 SHA-1: c95936da73e55a3f5ec44a14e00ffffa688d8dfd SHA-256: fb9c106bd6e606b60a3ca50b1b0c21ea73f75a3538197df4e3454ca72a7f25c1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains a high-confidence heuristic indicating it links to a game hack lure. The document body and extracted URLs reinforce this, pointing to a download page for a 'Coin Master Hack App'. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link to trick users into downloading potentially unwanted or malicious software.

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.online/app/406889139/coin-master-hack-app-2021-download-game-hack PDF link annotation
    • http://library.umla.ac.id//repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/pokemon-go-free-kanto_GM1094591345.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.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_off00004eea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EEA 26904 bytes
SHA-256: 0126d61b298d492e1a61366bf0898bdf188a629f2433155abd4ae307c3591d34
font_01_sfnt_off00008b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7A 18876 bytes
SHA-256: be5be3eecf441f83945d2891df9f868a1d3a5dfc921b9d485f27c984001e53f9

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