Malicious PDF — malware analysis report

Static analysis result for SHA-256 52fb015ee51142d1…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 10:33:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8d0df585bcb66c0dfaf10248344cb28b SHA-1: ccda2e42d3487a507111214fa1387a7444d808e5 SHA-256: 52fb015ee51142d1d335f1773c565be893738095d78e7dc4c99bb00c2d59083a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure related to "game hacks" and directs users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to trick users into downloading further malicious content or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/431946152/how-to-hack-into-someones-roblox-account-game-hack PDF link annotation
    • http://lib.icbc-indonesia.org/repository/tiktok-download-free-jio_GM835599320.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/robux-only_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-free-robux-with-out-information_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fe8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FE8 26160 bytes
SHA-256: ab56ecbdf5c81c51fdbd22e544db0c2d9bd1129bc41bd0d937e1d29a0b8280ce
font_01_sfnt_off00008ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA6 2820 bytes
SHA-256: 984d79cc00e4aaa21be427f23b56147105e8f12e1ad5c504d904a5b27c613147
font_02_sfnt_off0000963f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x963F 18852 bytes
SHA-256: e61c608513e4255ab8492ebba14a14bba84c9cdf9fdbd64ed05887b932178c19

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