Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8f49608bb89623…

MALICIOUS

PDF

42.3 KB Created: 2021-05-12 10:16:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b66e556f5acd92de9ae45e53739f5b7d SHA-1: 5a469bd30819c95401fd15a028deaafce4bc44e3 SHA-256: 9b8f49608bb896230770a1cd9b6ec8613a905bc0ed7116a42f8dc0a4651b8d72
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 0.9971

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.xyz/app/406889139/how-to-get-free-spins-grom-coin-master-game-hack PDF link annotation
    • http://pustaka.polbangtan-gowa.ac.id//repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id//repository/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.polbangtan-gowa.ac.id/repository/roblox-hack-scripts-pastebin_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_003_off00004bdf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BDF 24468 bytes
SHA-256: 15aefc268266ca9963759c7d76f1051ce7262bcd45d023a0145486005590eed9
font_01_sfnt_off0000830e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830E 18308 bytes
SHA-256: 54bc4cb339ab54a414e81dbc8c78cd983f23e840174d14985084a71892f993b4

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