Malicious PDF — malware analysis report

Static analysis result for SHA-256 c685c3f2a75aca0d…

MALICIOUS

PDF

32.8 KB Created: 2021-07-09 05:19:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d7ba4d7e97301b96ffd10c4c035454d8 SHA-1: 6a8cd1730fd11e3b9f5cdbc60c50f48118543182 SHA-256: c685c3f2a75aca0dbb00115e4746881c01088cc6c1a36cbc32453783a2bad927
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Roblox accounts' and 'game hacks', directing users to a URL that likely hosts a malicious payload or phishing page. The ML classifier and heuristics strongly indicate malicious intent, specifically a redirector designed to exploit user interest in game cheats. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.tw/app/431946152/free-roblox-accounts-with-builders-club-game-hack PDF link annotation
    • http://www.mondecasa.com/Public/upload/editorfiles/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-get-free-robux-with-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-get-free-robux-without-downloading_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/roblox-clone-cheat_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/roblox-speed-simulator-2-hack_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/secret-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/pastebin-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/rbx-free_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_off00002b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B3D 21328 bytes
SHA-256: 3c6a4b4328e0e0ee12eada601b7e361b049026a09f086b5671acab6ba881f089
font_01_sfnt_off00005a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1A 19552 bytes
SHA-256: b1eb7f5cc000dbd6647d8142d7b5a18728747fb2d8c014d369b8d8e037db6dcf

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