Malicious PDF — malware analysis report

Static analysis result for SHA-256 f157d6ee268edf98…

MALICIOUS

PDF

35.5 KB Created: 2021-07-06 12:17:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 975b8461bce7b28cb69d09b789c83346 SHA-1: 4548bd2be72777642197af4230f77f4c25adf623 SHA-256: f157d6ee268edf9820ebac9131860aa3d8b9d46c2dcf16df4e8bc3334589af49
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 0.9980

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/431946152/how-to-get-free-robux-without-downloading-apps-2021-game-hack PDF link annotation
    • http://lib.akpnbahtera.ac.id/repository/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-no-code_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/wurst-hacked-client_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_off0000317b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x317B 21840 bytes
SHA-256: 35604be1c18ae4baa3d86f3dba311963fca85996eab53a3e3c9b93e4ca1887df
font_01_sfnt_off00006160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6160 20464 bytes
SHA-256: bbee3cd2d045934f3587faaae269c5438879465e49c598d076b35cc198d7b491

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