Malicious PDF — malware analysis report

Static analysis result for SHA-256 cacafc688e518a8c…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 12:28:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2f7b8f2b0f0e35efaaaca6e4f6b5f7cc SHA-1: 806d83ff2d8bcbf9bd9b61cbf82137da4cd90c53 SHA-256: cacafc688e518a8c35cbf3ebdf5e74216f9ab4e30ac3a679d7ec43033709a4fe
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free in-game currency for popular games like Roblox. It contains multiple links, with a primary one pointing to 'http://netcdn.tw/app/431946152/how-to-get-free-things-on-roblox-game-hack', which is highly suspicious. The ML classifier also flagged this PDF as malicious with high confidence. The document's content and embedded links strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites.

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/how-to-get-free-things-on-roblox-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/how-to-change-your-roblox-name-for-free-working-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hack-to-train-railway-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/why-you-never-want-to-use-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-auto-clicker-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-apk-download_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-viseo-not-clickbait-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-game-guide-tips-hacks-cheats-mods-apk-download_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-pics_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hacking-someones-account-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/get-free-robux-just-by-joining-this-group_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/cheat-apocalypse-rising-roblox-25-fvrier-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/delta-hack-roblox_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_off00002f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8E 22188 bytes
SHA-256: 199d0a645443dde4b9425b891d62423fb9a6e0c4c503ddfa332accf5f5d9d8a6
font_01_sfnt_off00006075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6075 19204 bytes
SHA-256: b68b932afa1663feb9665ea06d56ff2102cae43e6122537b425140c4e8bc7904

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