Malicious PDF — malware analysis report

Static analysis result for SHA-256 4efa1d0b03d0b97c…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 08:21:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dc3d22442f8dd93f78f2950fde89f099 SHA-1: d6583e676e6dd274845b2753aeef8f11e80b4a95 SHA-256: 4efa1d0b03d0b97c83d9e7cd0b6738e0ef9a48fb23ddddbc28757fcee60ccfe7
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.tw/app/406889139/free-spins-coin-master-links-app-game-hack PDF link annotation
    • http://lc.pustaka.unand.ac.id/repository/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-hack-roblox-game-money_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-hack-gamepasses_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/easy-boy-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/robux-hack_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/fly-hack-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/a-free-8-pack-roblox-shirt_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/dragon-ball-rage-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/generator-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_off00003244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3244 23352 bytes
SHA-256: b900256bf359aad3e5422290dba82febb2978dafc70a8a4167999ae4f462d6e6
font_01_sfnt_off0000672f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672F 18344 bytes
SHA-256: 41bc66dd597855b83b127e7fa3b4688c6d3c5f419b7ef2562ac31c5e70babc09

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