Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf2fa7ddb35ba92…

MALICIOUS

PDF

46.4 KB Created: 2021-05-12 15:30:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7a308e3da0b1fb22b2381dedbb5c6efc SHA-1: a8d22f6fc4a834204a78ec2815d059e647627cd9 SHA-256: 1bf2fa7ddb35ba9215481de8565754687de67b186b185c0a73a013909161c468
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 0.8948

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.xyz/app/406889139/coin-master-hack-version-download-game-hack PDF link annotation
    • http://www.myresidence.lu/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/i-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/robux-online_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/can-you-actually-get-free-robux_GM431946152.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_003_off000049d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D4 27560 bytes
SHA-256: 3f93d2ec6c4e0ed58c5a5838d7a79cf28a2c3fd0459f0b97ade568bb9ba2eee4
font_01_sfnt_off000088bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88BD 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off0000925e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x925E 18428 bytes
SHA-256: f912b3cee97859de3df5e35c061868833ee48e9318237c6af7b49665e28b08ba

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