Malicious PDF — malware analysis report

Static analysis result for SHA-256 28150bb358cdad43…

MALICIOUS

PDF

45.2 KB Created: 2021-06-10 17:25:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7ea5b7976881b8c9fda8e4c18b2f222c SHA-1: 2433d2e06aa77bd1aa4e3abad5473e1d74c1b0d5 SHA-256: 28150bb358cdad43841c0c127ea13485002f34ff5317a8f2d1cbcecc88f67a5b
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.tw/app/431946152/how-to-get-free-robux-apex-spice-game-hack PDF link annotation
    • http://eurosystemssrl.it/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/pubg-uc-cheap-price_GM1330123889.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/tiktok-views-free_GM835599320.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-to-speedhack-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-to-get-free-robux-not-clickbait_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/robux-game-com_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-robux-today-glitch_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/jailbreak-script_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/https-webrobloxcom-games-2021202119-freeadmin-play-this-game-friends_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/cheat-engine-roblox-2021-robux_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-free-spins-no-survey_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_off000051e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E3 26728 bytes
SHA-256: 93ef209932ef9ad17826c647f1ca1708bb1686cb6559ebb6cd99289b528a4888
font_01_sfnt_off00008d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D03 18576 bytes
SHA-256: cfce1915e2adec46671bf1e68266404385c38e6037ebefc26176b3181c6e3d60

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