Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc37c8d045e64f3…

MALICIOUS

PDF

37.1 KB Created: 2021-07-04 05:44:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ba8271f3925d8a498c6b038efc046d4b SHA-1: 34b88eded3130cbf1b4a94a5bd8d35222f0b6a4e SHA-256: 9cc37c8d045e64f326436b7438b7b7a86067635edc4c98efb54016591f67bde8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.tw/app/406889139/free-coin-master-cards-game-hack PDF link annotation
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-girl_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-super-power-training-simulator-hack-script_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/cheat-in-roblox-jailbreak-fast-run_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/spin-coin_GM406889139.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-synapse-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-jailbreak-nclip-hack-2021-may_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/fort-hood-texas-hacks-roblox-yt_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
stream_002_off00003a58.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3A58 23228 bytes
SHA-256: 285e656077c963d6d71ffbf251afca02636aa5a327c24b52ccb872df89075722
font_01_sfnt_off00006ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED3 18172 bytes
SHA-256: 2fc47c4066dd28e3547f22ef08ec611cc49326c2517731f27ce49f34897b6455

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