Malicious PDF — malware analysis report

Static analysis result for SHA-256 f40d9d4dfa5230e8…

MALICIOUS

PDF

35.2 KB Created: 2021-06-22 11:56:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f7034f194e2fa52597c7f14fcd490bf7 SHA-1: f168cf4d3bea4cfd26358e6b3fa81a3341939ad2 SHA-256: f40d9d4dfa5230e88a9adb1ea80e79c9834b98a59471640696f09db8535fb00c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body also contains this URL and text related to game cheats. While no scripts were extracted, the PDF structure and embedded URI strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/406889139/coin-master-free-coins-link-game-hack PDF link annotation
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/ww-roblox-come_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • https://www.st-lukes-endon.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-glitch_GM431946152.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
font_00_sfnt_off000033b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B9 23016 bytes
SHA-256: b1a101d2eede0184a599adc07ec54202eafda25980168ab1a4e6e0ed829a72fb
font_01_sfnt_off00006780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6780 18168 bytes
SHA-256: 7e3864b359ae4e20f98f554aea3d5366a72fce57ca0fb6405be6acd76bdcbaac

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