Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b37d2b642c2f4a…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 06:09:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9b8dbc9b486780b34c523cf36959f460 SHA-1: cad197c3507a8599fb521f1b6c2bb38646f4a24d SHA-256: f3b37d2b642c2f4a1ef36919668bccaf1d8b17baa617263fdd342e66125f1c1a
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 0.9865

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/431946152/roblox-beeg-hack-download-game-hack PDF link annotation
    • http://www.perpus.stfm.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/indian-gamer-roblox-ninja-legends-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-gifts_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
stream_004_off0000500d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500D 25768 bytes
SHA-256: cdf6b5246ecf4965b2a02927c842dae08a2687174f30d8a8e2697b5b84e6d146
font_01_sfnt_off00008adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADC 18976 bytes
SHA-256: cf8622b5faa20e267b64f0b9cac09630e7de74cd5215e557e2e21be6020ecbec

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