Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ed4d54effa993e…

MALICIOUS

PDF

51.6 KB Created: 2021-06-09 15:01:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 11423de0dddf8ac95f20a5fe0873c0cc SHA-1: a9908de6541ce027e051610ede8099153e845447 SHA-256: a8ed4d54effa993e8d241570235f7122af029df99368030adca62f196b6c0194
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 0.9464

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/roblox-cheat-enginescript-injector-game-hack PDF link annotation
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-online_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/i-want-robux_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/roblox-prison-life-hack_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
font_00_sfnt_off000052bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52BB 28084 bytes
SHA-256: 9fdbe532e574d7dc3d9a58a7093b40283bd35dfcc117dea127f185d713e5289a
font_01_sfnt_off000092e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92E3 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_02_sfnt_off0000a4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C6 19052 bytes
SHA-256: cb25eea927226523a660c3116323ae30356e1b05aea0f5a26b3eff411b56cbf1