Malicious PDF — malware analysis report

Static analysis result for SHA-256 916b59e56d912172…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 03:58:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 61ea22a4432e34fbcee983861bcecf40 SHA-1: f7e810dc80b4ab2e2405654e613e1dbda1eb3f21 SHA-256: 916b59e56d912172aa6848cc194e16d00d9f99ddcec74f455b2d707114bf55a7
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/406889139/descargar-coin-master-hack-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hack-roblox-pastebin-gui_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-free-robux-add-to-chrome_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/master-coin-free_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-into-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-a-acc-with-btools-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/usando-hacks-en-roblox-murder-mistery_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/real-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/noclip-hack-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-rthro-packages-roblox-list_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/easiest-way-to-upload-audio-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/does-the-roblox-hack-work_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-drive-money-hack_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_002_off00003118.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3118 22904 bytes
SHA-256: b8ad13670f2c7351629ad28a3eb07ea3bc8342188a868de83ee24320485c5fc8
font_01_sfnt_off0000646c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646C 18172 bytes
SHA-256: 1789a8ba000f32d0cf379c807bdab686f3556df5b196f2a4d6102c9c21830956

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