Malicious PDF — malware analysis report

Static analysis result for SHA-256 8379f8e417efba75…

MALICIOUS

PDF

35.6 KB Created: 2021-06-17 21:44:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4be54721cb1298366812dc08683beeed SHA-1: a97f0fcb1073f718bcea6bb3c426dc80db056966 SHA-256: 8379f8e417efba752670b1bed87f156d1688a0fcb7c168613ecbe839ad192c47
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that explicitly advertises 'free robux' and game hacks, aiming to trick users into visiting malicious sites. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this phishing attempt. No scripts were extracted, but the document's structure and content point towards a social engineering attack designed to lead users to potentially malicious external resources.

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/earnrobux-gg-earn-free-robux-for-roblox-game-hack PDF link annotation
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/classic-builders-club-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-how-to-get-free-b-money-on-bloxburg_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-sell-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-leaderboard-script-hack_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-hack-2021-december_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-prison-life-v20-infite-ammo-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3352 23096 bytes
SHA-256: 7c2a34f26daebfd361ea6edb7dc840071d89af291934fb6b5f7ae2f171640711
font_01_sfnt_off0000679c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x679C 18604 bytes
SHA-256: a69b161e2e76b56523786cede8b7b42d49b202234544e77b450282ac0e16fde4

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