Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4a9cc9396922d3…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 16:44:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d3faa12afdfda11a31e0a00bc33ebee6 SHA-1: 33c79abdbac6430a88b321a7d9eb6b76d5ff42b6 SHA-256: 5d4a9cc9396922d3001a29b704d5b966f4cd116ea98c126a178bd2ca7f272db6
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/free-robux-without-verify-game-hack PDF link annotation
    • https://pustaka.mic.sch.id//repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/diamond-hack-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-offer-wall_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/noclip-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-cheat_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-items-katalog-roblox-glitch_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/tiktok-free-blue-tick_GM835599320.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/admin-roblox-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/retail-tycoon-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/destroy-walls-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/box-prizes-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/lemonade-hack-roblox-download_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/f-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-get-free-obc-in-roblox-2021_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
font_00_sfnt_off00002cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CD1 22220 bytes
SHA-256: 8f208262f992d25a6e891c5ac57a1fb639af3b11796b5edebbe8823a51cc9c12
font_01_sfnt_off00005e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E15 19620 bytes
SHA-256: 8aa86329d0795ab1cad193d913199e82be4c5431cadd1cc96f2f7af8a2f6b0e0

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