Malicious PDF — malware analysis report

Static analysis result for SHA-256 b437d4a87c1a7920…

MALICIOUS

PDF

35.5 KB Created: 2021-06-20 02:52:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 483574502294ae490504bc748fecf7ce SHA-1: 8af2d3c89c864b0b13608ebdc490671c6e3dd789 SHA-256: b437d4a87c1a79205145c2b927fe96f3fa18d681393571e18545f2e587777f45
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action lure related to 'free Robux' or game hacks, indicating a social engineering attempt to redirect users to potentially malicious websites. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a malicious intent. No scripts were extracted, but the document's structure and content point towards a phishing or malware distribution lure.

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/free-robux-or-real-without-email-needed-game-hack PDF link annotation
    • http://digilib-ppsunisma.ac.id/repository/how-to-hack-roblox-4-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-speed-hack-2021-booga-booga_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-create-clan-in-roblox-for-free-account_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-to-use-roblox-shirt_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-account-roblox-obc-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-tiktok-email-and-password_GM835599320.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/royale-high-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-february-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hack-site-robloxcom_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-hacks-2021-download_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/tiktok-free-download-apk_GM835599320.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-no-clip-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-you-get-free-robux_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_off00003174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3174 22508 bytes
SHA-256: 3205970f14618c3990873dcc89428396151606d782d53635ed3c02fa7009faf1
font_01_sfnt_off000063bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BD 19812 bytes
SHA-256: 53f113938b5be70c8a97d392f809be1f3f38b29df5db7da0b6eaa0bad26cdb14

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