Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8273e0c15acfe33…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 18:02:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9d8e3015c7aa20c516eecef6c481cc30 SHA-1: fc513064c6d7dd86edc5e9cf4cbc3bb0fdf72878 SHA-256: d8273e0c15acfe33ea7511a83ccd4f73f8d6c0c3aa10d9b3c24ed5ebc5d0a6b8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing for a game hack redirect lure, specifically mentioning 'free Roblox avatar'. The document body, though heavily corrupted, contains references to 'Free Roblox Avatar' and a URL that aligns with the lure. The primary function appears to be directing users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/free-roblox-avatar-game-hack PDF link annotation
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-gold-cards-free_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_off0000517b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x517B 28976 bytes
SHA-256: 89067bac720e29c0b1078a77d386df2a1a434e37743b8daca1f655fb52876479
font_01_sfnt_off00009073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9073 18396 bytes
SHA-256: ea9b66db0b849f47a5cfa8545e574f06832df8c426d4970ca3b5809346365e53

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