Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd5ac90d81482e6…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 23:20:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 83ef30eb9a760a371a77b8d4ebd1d0ab SHA-1: 01b104ddc86edbfb6574189ace468b5f74e32567 SHA-256: ddd5ac90d81482e6bc1015e8bcc53deb841594ba3f0318cc3c93b46f20317360
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that promise game hacks and free currency, indicating a social engineering lure. 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 lures suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/can-you-really-hack-coin-master-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id//repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/whats-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-devil_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/what-is-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/tiktok-free-recharge-500_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hacks-to-get-free-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
stream_004_off00005178.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5178 24924 bytes
SHA-256: 49cb66f5fb34232d4a396489c2d1ce3f1456780e02a4f06bbb893fe410f6624b
font_01_sfnt_off000089f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F4 18272 bytes
SHA-256: 673297a7d6d275bbcd364c291cde02cd01d24458221a0908b56fbaba527eed30

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