PDF static analysis report

Static analysis result for SHA-256 616b5b408bc0d72c…

SUSPICIOUS

PDF

34.6 KB Created: 2021-06-19 16:00:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0d95783e2099f1743868ef16743586ab SHA-1: 91efc2d268f6aca2fcc38b94eedf1661d5a02ede SHA-256: 616b5b408bc0d72cea04f6329cdaf78b170326f50f0c7269e20a8f50940daf51
42 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs and a prominent call-to-action related to obtaining free Robux, a popular in-game currency. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to redirect the user to a malicious download or exploit site. The document body, though partially garbled, reinforces the lure of free Robux.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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/robux-hack-online-free-game-hack PDF link annotation
    • http://lib.vipklh.ru/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/easy-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/follow-button-gives-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-tbc-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-free-dominus-hat_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-hack-flood-escape-2_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-make-your-t-shirt-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/cm-spin-link_GM406889139.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_off00003249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3249 21868 bytes
SHA-256: e52cc8f01b65e2d9fd16c485893fdf479d51d34203a69767531c2653142c207b
font_01_sfnt_off00006251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6251 19080 bytes
SHA-256: 37809de395366fcc3d8483b9d6fd5e7adcb437e16ba3b2bdd190572a95b047ee