Malicious PDF — malware analysis report

Static analysis result for SHA-256 550ac93b91fbc5f9…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 18:02:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b63d9ac2b594570f5d47dab4efce4b8e SHA-1: fc7a7cf029b3a941fc08c5904b96a9c49c93fcb9 SHA-256: 550ac93b91fbc5f90eb07570773d7f3da7ada266aa11b719972ce4d012ea7eff
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs that lure users with promises of game hacks and free generators, specifically mentioning Roblox and Coin Master. The primary malicious URL identified is https://netcdn.online/app/431946152/hacks-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/hacks-roblox-game-hack PDF link annotation
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-re_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
stream_004_off00005437.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5437 25436 bytes
SHA-256: 708c8fb0727234ff6aa0ccb4ffb02782373030889a3a0c27341825e7e9970231
font_01_sfnt_off00008ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF6 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000098a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A8 18184 bytes
SHA-256: 7ce99462d7db30d9d686f16fdffa062e1f918298e62a3f0da8fa4bf2d2fabb79

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