Malicious PDF — malware analysis report

Static analysis result for SHA-256 097384282725f668…

MALICIOUS

PDF

35.4 KB Created: 2021-06-22 14:32:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2fe4b113f5f3c613fe046966ddaefcbb SHA-1: cb904c460811184a29eeac6622b99c971337a296 SHA-256: 097384282725f668d938c385c683d62a4137ca9a321f55abb2cfd37fbacfbf7f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. This is a common social engineering tactic to trick users into visiting malicious sites, likely for credential harvesting or malware delivery. The ML classifier strongly indicated maliciousness, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the embedded link.

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/431946152/free-robux-without-human-verification-real-game-hack PDF link annotation
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-page_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-make-t-shirt-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-cheat-engine-alternative_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/is-minecraft-dungeons-free_GM479516143.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_off00003116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3116 22436 bytes
SHA-256: 4998edb6fc5e18ebad8f13f3c3aa9bcbe94b23d2aea4c49067e9e776f65b9b1f
font_01_sfnt_off0000634b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634B 19772 bytes
SHA-256: fc568478bc399a77401a6ddd4d7c7c349cb7de37f92cd72754d4c54c01944b1d

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