Malicious PDF — malware analysis report

Static analysis result for SHA-256 37939b5ffa6ada73…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 21:36:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 412ef0b3190a36d2672e0b9a76a6e671 SHA-1: 183be544f0694be169e0652e6f78010319d2a797 SHA-256: 37939b5ffa6ada73bc9bc5aac7cc5552e23242b65bcc1af5520961a56c678f59
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/479516143/free-minecraft-games-for-kids-game-hack PDF link annotation
    • http://library.ft.upnvj.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/robloxcom-robluks-for-free_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-no-scam-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/crax-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-t-shirt-adidas-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-robux-for-free-without-verification_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-kohls-admin-infinite-cheat_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-hack-no-download-or-surveys_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/cheat-power-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-bomb-vest-free_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-stuff-from-catalog-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-song-code-for-cheat-codes-nitro-fun_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-free-level-7-script-executor_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3426 22108 bytes
SHA-256: 84abf7bcd3a341a8fd32e682f306b72ec3a45d9be271b1c1a6dfd949abd82998
font_01_sfnt_off000064dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DC 18432 bytes
SHA-256: fce0cee9bb026e9b658c5a6be084441bf5d333caf380f9a351f6fa516673a190

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