Malicious PDF — malware analysis report

Static analysis result for SHA-256 139be5a2ee8714a9…

MALICIOUS

PDF

47.6 KB Created: 2021-06-03 23:43:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a9a6a08b8b9add97ef7b716fb28da9a9 SHA-1: dda03b8f53fcbe4e1e26030c7c9c86b450dac21b SHA-256: 139be5a2ee8714a9983a9a4df237f9f95123112a7ea4be906022034a1a7c1767
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' lure. The embedded URLs, such as 'https://netcdn.online/app/431946152/roblox-games-with-free-boombox-game-hack', are designed to trick users into downloading potentially malicious files or visiting phishing sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/431946152/roblox-games-with-free-boombox-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000510f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x510F 25140 bytes
SHA-256: 0dbbc46fac621e924eff51a25f54f11ad7f778c85feba6deeb836105dec2d172
font_01_sfnt_off00008adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADF 2940 bytes
SHA-256: ae8acc7f13e86db3aed98d7dfb73e70e16f4dedb45e9f0467460b76f54e1a1bb
font_02_sfnt_off000094ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94EE 19024 bytes
SHA-256: f19becf6ce6933bb0ac9725c8bd55fde31cd7c8868717e467a8d53035955367c

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