Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d144324c49e1fc…

MALICIOUS

PDF

47.0 KB Created: 2021-05-14 20:01:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ace960a06690282171c713831d9fdf20 SHA-1: ede0ad6d2c14016e47c08693fcac408234f45792 SHA-256: 79d144324c49e1fc98a3d8c6d8abf05a12dddeec2000a79bab674c4470078a0a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that are disguised as 'free generators' or 'game hacks' for popular games like Roblox and Coin Master. These links, such as the primary one to 'netcdn.xyz', are likely designed to redirect users to malicious websites or initiate unwanted downloads. The ML classifier also flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.xyz/app/431946152/free-robux-no-verification-2021-android-game-hack PDF link annotation
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-free-coins-links-2021_GM406889139.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_003_off00004d36.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D36 25284 bytes
SHA-256: c79c9fca53836ed208ae8b7ba094b3bfa00c814a63c6e3a5e00377e2791b07f2
font_01_sfnt_off00008837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8837 2984 bytes
SHA-256: 2df87bbe4e27b27e34c872c092d0522acd977d05f5cbde7ed5e1fdfeb59cb318
font_02_sfnt_off00009285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9285 19176 bytes
SHA-256: 2db8195158682863467aa5049c27493158ce29af4e73d213a7d216c5b0c72741

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