Malicious PDF — malware analysis report

Static analysis result for SHA-256 c822ca62fd627755…

MALICIOUS

PDF

34.9 KB Created: 2021-07-01 18:40:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 561989a03a0442052c0a44cb3dc22e94 SHA-1: aa17724ed9464aa214683b369fc7554463c76f9d SHA-256: c822ca62fd627755a4019f4787435eaae0f6a86c31110ca9bc43253075b32ce6
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/free-robux-hack-generator-without-human-verification-game-hack PDF link annotation
    • http://lib.mappifhui.org/repository/redeem-credit-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-hack-exploit-troll_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-negg_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-how-to-join-builders-club-for-free_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/cheat-zombie-attack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-free-robux-hack-i-impress-all-your-friends_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/imy-roblox-account-got-hacked_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/follow-people-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/como-recuperar-una-cuenta-hackeada-de-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/gain-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/pubg-uc-hack-apk_GM1330123889.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hack-de-robux-2021-android-fast_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-redeem-codes-for-robux-october-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_off000031c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C2 21644 bytes
SHA-256: 6ddcfdd92eb6f78d76291d0050eeb974029f971bce659e31dc03fcc7be7ed5c7
font_01_sfnt_off0000614d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614D 19868 bytes
SHA-256: fbf54cbf929a90e494782c9070dccce514a830302e99547bcd972ba246363ea0

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