Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4e8991362e938ca…

MALICIOUS

PDF

35.9 KB Created: 2021-06-28 02:37:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cae1c08ab81d9058619bbd89b169afd4 SHA-1: dd993b1b8a04d5174018af0aa71904f4313fc983 SHA-256: f4e8991362e938cae06e2e7c9465be0c1c10a77feabf39e3aee5a9b57d959b92
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.co/app/431946152/op-wii-roblox-cheat-game-hack PDF link annotation
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-how-to-change-your-name-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/what-game-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/cheat-roblox-jailbreak-money-give_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-duolingo-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-hack-generator-no-download_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/https-rbx-place-rewards_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_002_off000031d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31D0 23344 bytes
SHA-256: 2496e4fdd1448e41f1013e8254bccef983a8fcb87fa300e80cc6b886f298b852
font_01_sfnt_off000066b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B4 19252 bytes
SHA-256: 4b24699fdea1de8ded16c13ada409dddcaa9306cd10a2996168759966ce0ecc2

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