Malicious PDF — malware analysis report

Static analysis result for SHA-256 31983fa940e6b5da…

MALICIOUS

PDF

51.4 KB Created: 2021-06-09 04:17:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b49702541a203e3c86fb1bfe1c601148 SHA-1: 17ed5e1ee28cc83f9991fbeeb11580bcd548f238 SHA-256: 31983fa940e6b5daef1547dfa4029767c1be838843c56e0e6f3ed2536cd4977c
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 0.9861

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 https://netcdn.tw/app/431946152/game-hack-roblox-game-hack PDF link annotation
    • http://pustaka.fkg.unand.ac.id/repository/roblox-speed-hack-feb-10_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/cheat-doodle-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-06-accounts-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-cursor-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-free-robux-100-working-secret-method_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-gas-station-simulator-money-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-a-free-name-change-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-minecraft-java-edition-for-free_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_off00005120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5120 36616 bytes
SHA-256: a563342e87bf06951b7ed1f5fe4c0ae74fb4bf72f09c7567464a6c4833b4920f
font_01_sfnt_off0000a66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA66C 18440 bytes
SHA-256: ac2cde244f3e440c501faa3f7bc75f1de8c4d20981ae5f236ab67eee9bae5e72

Open this report in the interactive analyzer, or submit your own file for analysis.