Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e161a165c163640…

MALICIOUS

PDF

34.2 KB Created: 2021-06-26 07:28:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 55aa104473b77f89d4225e97714c4a40 SHA-1: e6ae4be82afd1e8f339ecdbd12ca15394d200032 SHA-256: 4e161a165c1636407983baaf8ddfee804791e7c51fb0f1a56e8c80dcc5cd86b7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to trick users into clicking malicious links. The primary link, http://netcdn.co/app/431946152/how-to-sell-at-shirt-for-free-on-roblox-game-hack, is presented as a way to get free items in games. While no scripts were extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely leading to a second-stage download.

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/how-to-sell-at-shirt-for-free-on-roblox-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-cheat-engine-commands_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/wurst-18_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/robux-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-admin-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hackear-y-tener-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-zephplays_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-actual-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-pe-hacks-ios_GM479516143.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_off00002f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0C 22320 bytes
SHA-256: 8f9866977438ad3156edf0f9cad3c32b537a2b7aa9c2a0fff2370b47e6965887
font_01_sfnt_off0000605a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605A 19204 bytes
SHA-256: 260a62e31de55185c9b2171d48a787397db16625afa0aca785a646709ae4d2aa

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