Malicious PDF — malware analysis report

Static analysis result for SHA-256 534d99428ca9bfbb…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 12:51:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 90bb9810b1b52142ed04513fb2de8fb0 SHA-1: f22ffd5131658f696bd9c5e1b87e4b6ff109b639 SHA-256: 534d99428ca9bfbb81d9ccef9c14cc5a7e0c073bd622d98830681249681e090c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. The embedded URL is likely intended to download a second-stage payload or redirect to a phishing site.

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/479516143/how-to-get-hacks-on-minecraft-game-hack PDF link annotation
    • http://digilib.stie-yppi.ac.id/repository/roblox-bloxburg-free-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-shirt-template-free-to-use_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-roblox-girl-clothes-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/hacking-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/tiktok-free-view-59_GM835599320.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/impact-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-jump-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/claim-free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/inject-hack-download-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/pokemon-go-free-or-gotcha_GM1094591345.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-robux-for-free-instantly_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/cheat-robux-2021-pc_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/bux-life-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_off000030c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C4 22800 bytes
SHA-256: ea386500ce2a2e2d3a177ac769d83a692d1a42f5df9f3d49f4ca6e3696c344a9
font_01_sfnt_off000063c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C1 18332 bytes
SHA-256: 7074210b4cd1020dcfe52daa4947dc8d4893434919d69b6619189279454e1a4d

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