Malicious PDF — malware analysis report

Static analysis result for SHA-256 848ff5ecc158a952…

MALICIOUS

PDF

42.4 KB Created: 2021-05-16 04:32:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9678660c49a332a77815fd28f451c94e SHA-1: 09c18245fe410b4cc1928291629d777ea0e40f4e SHA-256: 848ff5ecc158a952b675fb4c29f49b1cae7546240e76ad394759af498ac37e4d
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 0.9971

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/hack-game-plus-com-coin-master-game-hack PDF link annotation
    • http://eurosystemssrl.it/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/generator-robux_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/app-store-coin-master-free-spins_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_003_off00004a9d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A9D 24640 bytes
SHA-256: 3aead19953f47870f64a96fd82bc227883292be7571c5e787e493168e4d31fce
font_01_sfnt_off00008341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8341 18344 bytes
SHA-256: 67e0faa45ea1c1ed6f200b64ded63a8801cb37d584db731deacfac1a4f2a4512

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