Malicious PDF — malware analysis report

Static analysis result for SHA-256 1534d85143f2f367…

MALICIOUS

PDF

43.5 KB Created: 2021-06-04 01:41:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 38a2c6a774087f2f294e901d3470baac SHA-1: a6d18546acd7fd8c0514eb2d67655fe438b7a19c SHA-256: 1534d85143f2f367f4894e2614e6a90b4cf9f994117acdeef6fef003aa2dfd88
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically https://netcdn.online/app/406889139/freespinandcoin-blogspot-game-hack. The document body is heavily obfuscated, but the presence of this lure suggests a social engineering tactic to trick users into visiting a potentially malicious site. No scripts were extracted, but the embedded URLs and the lure itself strongly indicate a phishing or malware distribution attempt.

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/freespinandcoin-blogspot-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robux-scam_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/is-coin-master-free_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_004_off00004e59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E59 24400 bytes
SHA-256: a24bc2f3451ccc115fc4a88215368934f4b8ebbc9245575a0ec5a11185ea24dd
font_01_sfnt_off00008654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8654 18636 bytes
SHA-256: 39ad49e7f2f7b1e1661e6b5506a71ed4a13bb8570fb289ec0037d4e7a36d4803

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